Service Manual - Jane and John`s Place!

Transcription

Service Manual
Gas/Electric Refrigerators
INC.
MODELS
1200XX
120X-IMXX
!
WARNING
DO NOT install this refrigerator in below deck marine applications. Do not
install this refrigerator in fixed indoor cabin or other dwelling applications. This
refrigerator must use only NORCOLD designed and approved outside air intake and exhaust ventilation for correct and safe operation. Any other ventilation could cause lethal combustion exhaust fumes and or/explosive propane
gas fumes to be in the living area and/or below deck.
© 2005 THETFORD CORP., NORCOLD, INC. All rights reserved.
Publication No. 618968B (02-18-05)
TABLE OF CONTENTS
Introduction ------------------------------------------------------ 1
Electrical Requirements and Components ----------- 28
About this Manual ................................................................. 1
Model Identification .............................................................. 1
Information Label ................................................................. 1
Cooling Unit Serial Number ................................................ 1
Certification and Code Requirements ................................ 1
About Installation ................................................................. 1
Replacement Parts .............................................................. 1
Technical Assistance ........................................................... 1
DC Voltage Requirements and Polarity ............................ 28
Power Board DC Fuse ...................................................... 28
DC Power Wiring Requirements ....................................... 28
AC/DC Converter as Power Source .................................. 28
Lamp Assembly ............................................................... 28
Divider Heater .................................................................. 28
AC Power Requirements ................................................... 29
AC Heaters ....................................................................... 29
AC Heater Circuit Fuse .................................................... 29
Power Board AC Power Cord ........................................... 29
Ice Maker AC Power Cord ................................................ 30
12 Vdc Ventilation Fans ...................................................... 30
Safety Awareness ---------------------------------------------- 3
Safety Notice ......................................................................... 3
Attention Statements ............................................................ 3
Safety Statements ................................................................ 3
Specifications --------------------------------------------------- 4
1200XX/120X-IMXX Models .................................................. 4
Troubleshooting – Quick Reference Guide ------------ 5
Displayed Fault Codesr -------------------------------------- 6
Troubleshooting Flowcharts -------------------------------- 8
Blank Display – Refrigerator does not turn on .................... 8
no LP - no FL Fault Code – Burner failed to ignite or
reignite .................................................................................. 9
dc LO Fault Code – Low dc voltage ................................... 10
Sr FS - Sr Fault Code – Flame sense circuit failure ......... 10
dc HI Fault Code – DC voltage high .................................. 11
Sr CL - AC rE Fault Code – AC relay stuck closed ............ 11
no AC Fault Code – No AC power available ...................... 12
AC LO Fault Code – AC voltage low .................................. 13
AC HI Fault Code – AC voltage high .................................. 13
AC HE Fault Code – AC heater failed open ...................... 14
Food Compartment Lamp Switch ..................................... 15
Lamp Switch Operation .................................................... 15
dr Fault Code – Door open for more than 2 minutes ....... 15
Lamp Switch Testing Procedure ...................................... 15
Thermistor Failure Fault – Controls in Backup Operating
System mode ..................................................................... 16
Backup Operating System (BOS) ...................................... 16
1200XX/120X-IMXX Backup Operation .......................... 16
Power Board Resetting Procedure ................................... 17
no co Fault Code – No cooling detected by the controls - S/
N 832171 and higher ......................................................... 17
Ventilation ------------------------------------------------------- 18
Roof Exhaust Venting ......................................................... 18
Air Intake Vent ..................................................................... 18
Roof Exhaust Vent .............................................................. 18
Baffles ................................................................................. 19
Vertical Angled Baffles ..................................................... 19
Double Sidewall Venting .................................................... 20
Air Intake Vent .................................................................. 20
Sidewall Exhaust Vent ...................................................... 20
LP Gas System ------------------------------------------------- 23
Pressure Requirements .................................................... 23
Components ...................................................................... 24
Testing for LP Gas Leaks .................................................. 24
Solenoid Gas Valve ......................................................... 24
Solenoid Gas Valve Connections .................................... 24
Replacing Old Style Gas Valve ....................................... 24
Orifice ................................................................................ 25
Burner ............................................................................... 25
Burner Tube ...................................................................... 25
Flue ................................................................................... 26
Flue Cap ........................................................................... 26
Flue Baffle ......................................................................... 26
Flame Appearance ............................................................. 26
Burner Cleaning Procedure ............................................... 27
Refrigerator Service Manual
Cooling Unit ----------------------------------------------------- 31
Description ......................................................................... 31
Heat Absorption ............................................................... 31
Leveled Operation ............................................................ 31
Gradual Decrease in Cooling Efficiency ........................... 31
Cooling Performance Monitoring Control ......................... 31
Units with Serial Numbers 832171 and Higher Only ..... 31
Cooling Unit Monitoring Control Operation ..................... 32
First "no co" Fault Code .................................................... 32
Refrigerant Leakage .......................................................... 32
Disposal of Cooling Unit ................................................... 32
Cooling System Diagnostic Flowchart .............................. 33
Removing the Refrigerator and Cooling Unit ................. 35
Replacing the Cooling Unit ................................................ 35
Removing Cooling Unit ................................................... 36
Installation of Replacement Cooling Unit ...................... 36
Reinstallation of Refrigerator into Enclosure .................. 38
Electronic Components ------------------------------------- 39
Power Board ....................................................................... 39
Removal–Power Board .................................................... 39
Installation–Power Board ................................................. 39
Controls ----------------------------------------------------------- 40
Optical Control Assembly ................................................... 40
Replacing Optical Control Assembly .............................. 40
AUTO AC Operation ......................................................... 41
Modes of Operation, S/N 832170 and Lower ................... 41
AUTO ................................................................................. 41
AUTO LP Operation ......................................................... 41
Shift from AUTO LP GAS to AUTO AC ............................. 41
No AC Power and No Flame ............................................ 41
Troubleshooting No Flame and No AC Faults ................ 41
AC Manual Mode ................................................................ 42
No AC Power or Loss of AC Power .................................. 42
AC Power Restored .......................................................... 42
Troubleshooting "no AC" Fault ........................................ 42
LP Manual Mode ................................................................. 42
Flame Fails to Ignite or Flame Goes Out ........................ 42
AUTO AC Operation ......................................................... 43
AUTO LP Operation ......................................................... 43
Modes of Operation, S/N 832171 and Higher .................. 43
AUTO ................................................................................. 43
Shift from AUTO LP GAS to AUTO AC ............................. 43
No AC Power and No Flame ............................................ 43
Troubleshooting No Flame and No AC Faults ................ 43
AC Manual Mode ................................................................ 44
No AC Power or Loss of AC Power .................................. 44
AC Power Restored .......................................................... 44
Troubleshooting "no AC" Fault ........................................ 44
LP Manual Mode ................................................................. 44
Flame Fails to Ignite or Flame Goes Out ........................ 44
Diagnostic Mode - S/N 832170 and Lower ------------ 45
Diagnostic Mode ................................................................ 45
www.norcold.com/cda
1200XX/120X-IMXX Models
i
Accessing the Diagnostic Mode ....................................... 45
Changing Screens ............................................................ 45
Exiting the Diagnostic Mode ............................................. 45
Screens and Diagnostic LEDS Information, Units with S/N
832170 and Lower ............................................................. 46
Diagnostic Mode - Units S/N 832171 and Higher ---- 48
Diagnostic Mode ................................................................ 48
Accessing the Diagnostic Mode ....................................... 48
Changing Screens ............................................................ 48
Exiting the Diagnostic Mode ............................................. 48
Screens and Diagnostic Segments Information .............. 49
Wiring Pictorials and Diagrams -------------------------- 51
Ice Maker Components and Service ------------------- 54
Specifications ..................................................................... 54
Wire Harness ..................................................................... 54
Water Fill Tube ................................................................... 55
Water Fill Line ..................................................................... 55
12 Vdc Water Line Heater .................................................. 55
Water Valve ......................................................................... 56
Water Valve Replacement Procedure ............................. 56
To install replacement solenoid water valve: .................. 56
Ice Maker Troubleshooting Chart ...................................... 57
Water Valve Service ............................................................ 57
Replacing Ice Maker .......................................................... 58
Cycle Testing Ice Maker ..................................................... 59
Checking Water Valve Operation ....................................... 59
Water Fill Adjustment ......................................................... 60
Checking Water Valve Solenoid Resistance .................... 60
Checking Mold Heater Resistance ................................... 61
Checking Voltage to Motor ................................................. 61
Winterization ....................................................................... 61
ii
www.norcold.com/cda
INTRODUCTION
About this Manual
Certification and Code Requirements
This service manual provides maintenance, diagnostic,
and repair information for NORCOLD, INC.® model
1200XX/120X-IMXX gas absorption refrigerators. It is a
reference tool designed for technicians who are
knowledgeable in the theory and operation of gas/
electric absorption refrigerators, liquefied petroleum
(LP) gas–propane–systems, and AC/DC electrical
systems as installed in a variety of recreational
vehicles (RV).
NORCOLD, INC.® 1200XX/120X-IMXX gas/electric
absorption refrigerators are certified under the latest
edition of ANSI Z21.19B standards for installation in
mobile homes or recreational vehicles. NORCOLD,
INC.® 1200XX/120X-IMXX gas/electric absorption
refrigerators are also certified with the Canadian
Standards Association, CAN/CGA-1.4-M94.
All information, illustrations, and specifications
contained in this publication are based on the latest
product information available at the time of publication.
NORCOLD, INC.® reserves the right to make changes
at any time without notice.
About Installation
Model Identification
Model 1200XX/120X-IMXX are 2-way refrigerators that
can operate on AC power or LP gas. The electronic
controls operate on 12 Vdc.
Letter(s) appended to the model number identify
factory installed accessories. For example, a 1200IMSS is a 2-way refrigerator equipped with an ice
maker and stainless steel doors.
Information Label
The information label is located in the upper right
corner of the fresh food compartment just below the
divider. See Figure 1, page 2. The label provides the
following information:

Serial number.
Model number.
LP gas (propane) pressure.
Btu/hr.
AC voltage and amperage.
DC voltage and amperage.
Design certification.
Vent kit requirement.
compliant.
Refrigerator installation must conform with the
1200XX/120X-IMXX Installation Manual for the
NORCOLD, INC. ® limited warranty to be in effect.
Installation must also comply with applicable local
codes and standards set by the applicable certification
agency.
Replacement Parts
Use only authorized NORCOLD, INC.® replacement
parts. Generic parts do not meet NORCOLD, INC.®
specifications for safety, reliability, and performance.
The use of unauthorized aftermarket or generic
replacement parts voids the refrigerator's limited
warranty coverage.
Technical Assistance
If unable to resolve technical issues using the
information provided in this manual, technical support
for service technicians is available through the
NORCOLD, INC.® Customer Service Center:
℡ Telephone: .................................... 1-800-444-7210.
Fax: .............................................. 1-937-497-3183.
World Wide Web: ............... www.norcold.com/cda.
The following information is required to process
technical support requests:
Cooling Unit Serial Number
The cooling unit has a separate serial number that
appears on the cooling unit bar code label. The label is
affixed to the surface of the cooling unit leveling
chamber. See Figure 2, page 2.
Electrical components are

Model number.
Serial number.
Make, model, and year of recreational vehicle.
www.norcold.com/cda
1
NORCOLD. INC.
ON
1 COLD9 COLDEST
SET TEMP
MODE
ON/OFF
SIDNEY, OHIO
SERIAL # / N de serie
XXXXXXX
11 "WC
REFRIGERANT/frigorigene
R707
2.54 LBS
MODEL # / N de modele
1200LRIM
TESTED FOR LP GAS: EQUIPPED FOR PROPANE / Teste
pourle GPL, equipped por le propan
SUPPLY
BURNER
alimentati
bruleur
120VAC
60Hz
10.5 "WC
3.8 Amps
456 Watts
12VDC
TEST PRESSURE /
D'ESSAI 800 PSI
1.90 Amps
23 Watts
GROUP CODE / code de
30916
INPUT / puissance
SIGN
DE
2200 BTUH
Pour installation vehicule de plaisance
Degagement minimum pour I'installation
0" cotes, haut,bas, arriere, Installer
uniquement avec latrousse n_3
Voir les instructions d'installation.
618860
CERTIFIED
C
R
CSA-1.10-2003
REFRIGERATORS
ER
NORCOLD
XXXXXX
Made in USA
Bar code label
Serial Number
NORCOLD
700000
Serial Number
Made in USA
NORCOLD
XXXXXX
Made in USA
Plain text label
Figure 2. Cooling unit bar code label location
2
www.norcold.com/cda
TI FIE
ANSI Z221.19-2003
REFRIGERATORS
Figure 1. Refrigerator information label location
Serial Number
D
For recreational vehicle installation
Min. Installation clearance 0" sides, top
bottom, back. Install only with Kit #3
See installation instructions.
R
SAFETY AWARENESS
Safety Notice
It is not possible to anticipate all of the conceivable
ways or conditions under which the refrigerator may be
serviced or to provide cautions as to all of the possible
hazards that may result. Standard and accepted safety
precautions and equipment should be used when
working on electrical circuits and handling toxic or
flammable materials. Safety goggles and other
required protection should be used during any process
that can cause material to become airborne, such as
removing a leaking cooling unit and cleaning
components.
The safety alert symbol with the appropriate heading
appears on all safety labels posted on the refrigerator
and safety awareness notices presented throughout
this manual.
!
WARNING:
The above heading identifies hazards or conditions,
which if ignored can cause serious injury, death, and/
or extensive property damage.
Attention Statements
!
The safety alert symbol ! followed by the word
WARNING or CAUTION identifies potential safety
hazards or conditions.
CAUTION:
The above heading identifies hazards, which if ignored
can cause injury and/or property damage.
Safety Statements
! Do not modify, alter, or equip the refrigerator to the
use of any other fuel (natural gas, butane, etc.). 1200
refrigerators are designed and equipped for the use of
LP gas–propane gas–only.
! Do not use leak test solutions that contain ammonia
or chlorine. Ammonia and chlorine degrade copper and
brass components.
! The cooling unit is a sealed system under
! Incorrect installation, adjustment, alteration, or
pressure! Do not try to repair or recharge the cooling
unit. Do not bend, drop, weld, drill, puncture, saw, or
strike the cooling unit.
maintenance of the refrigerator can cause personal
injury, property damage, or both.
! Do not smoke, light fires, or create sparks when
! Handle a leaking cooling unit with extreme
caution! The cooling unit contains ammonia,
hydrogen, and sodium chromate. Ammonia can cause
severe skin and eye burns. Hydrogen is highly
flammable, can ignite, and burns with an intense
flame. Certain chromium compounds, such as sodium
chromate, are carcinogenic.
working on the propane gas system.
! Do not use an open flame for leak testing any of the
propane gas system components. Propane gas is
highly flammable and explosive.
! Always use two wrenches to tighten or loosen LP gas
connections. Damaged connections, piping, and
components create the potential for gas leaks.
! All electrical connections and repairs to the refrigerator
must comply with all applicable codes. Refer to the
certification and code requirements section of the
1200XX/120X-IMXX Installation Manual for more
information.
! Do not work on live electrical circuits. Turn off AC
power and DC power sources before attempting to
remove, service, or repair any of the refrigerator's
electrical or electronic components.
! Do not modify, bypass, or eliminate any of the
refrigerator's electrical components, electronic circuits,
or propane gas system components.
! Do not wet or spray liquids on or near electrical
connections or electronic components. Most liquids,
including leak detection solutions, are electrically
conductive and pose the potential for an electric shock
hazard, short electrical components, damage
electronic circuits, and/or ignite a fire.
!
Do not use extension cords. Do not remove the
grounding prong from the refrigerator AC power cord.
Do not use a two prong adapter to connect the
refrigerator to the AC outlet.
! Do not over-fuse electrical circuits. Use specified
fuses and AWG wire sizes. The "Specifications"
section of this manual provides fuse size information.
Refer to the 1200XX/120X-IMXX Installation Manual
for the correct AWG wire size specifications.
! Prevent child entrapment! Before disposing of the
refrigerator, remove all doors and fasten all shelves
with retainers.
! Some of the refrigerator's metal components have
sharp corners and edges. Wear hand protection, such
as cut resistant gloves, and exercise extreme care
when handling the refrigerator.
! Make sure all hardware, such as hinges and fasteners
(retaining screws, etc.), is properly fastened.
www.norcold.com/cda
3
SPECIFICATIONS
Storage volume
Freezer ----------------------------------------------------------------------------------------------------------------------- 1.3 ft.3 each
Fresh food compartment -------------------------------------------------------------------------------------------------------- 8.0 ft.3
Rough opening dimensions (H x W x D)
1200XX/120X-IMXX ---------------------------------------------------------------------------------- 63 1/4 in. x 32 11/16 in. x 24 in.
Decorative panels dimensions
Thickness --------------------------------------------------------------------------------------------------------------------------- 3/16 in.
Freezer door (H x W) ----------------------------------------------------------------------- 17 17/32 in. x 16 11/16 in. (each door)
Fresh food compartment door ------------------------------------------------------------ 40 11/32 in. x 16 13/64 in. (each door)
Controls
Type ------------------------------------------------------------------------------------ Electronic with built-in diagnostic function
ON/OFF/MODE/TEMP SET switches ----------------------------------------------------------------- Flush push-button style
Temperature settings ---------------------------------------------------------------------------------------------- 1=cold, 9=coldest
Temperature sensor ---------------------------------------------------------------------------------------- Thermistor, fin-mounted
Off-level operating limits
Side-to-side ------------------------------------------------------------------------------------------------------- 3 degrees maximum
Front-to-back ----------------------------------------------------------------------------------------------------- 6 degrees maximum
DC power
Controls operating voltage ----------------------------------------------------------------------------------------- 10.5 to 15.4 Vdc
DC fuse (F1 in power board) ------------------------------------------------------------------------------------------------------------Units with serial numbers 51660 and lower ---------------------------------- 3 A (violet color), automotive blade type
Units with serial numbers 51661 to 8321171 -------------------------- Two, 3 A (violet color), automotive blade type
Units with serial numbers 8321172 and higher -------------------------------- 5 A (tan color), automotive blade type
DC amp draws (at nominal 12 Vdc)
Automatic ignition ----------------------------------------------------------------------------------------------------------------- 0.50 A
Moisture reduction heater and divider heater ------------------------------------------------------------------------------- 0.70 A
Fresh food compartment lamp ------------------------------------------------------------------------------------------------- 0.46 A
Gas valve --------------------------------------------------------------------------------------------------------------------------- 0.146 A
Fans (2) ------------------------------------------------------------------------------------------------------------------ 0.30 A (per fan)
AC power
AC heater operating voltage requirements ----------------------------------------------------------------------- 108 to 132 Vac
Fuse AC heater circuit (F3 in power board) ------------------------------------ 5 A, 1/4 in. x 1 1/4 in. AGC type fast acting
AC heater rating ------------------------------------------------------------------------- 225 W @ 120 Vac (resistance of 64 Ω)
LP gas (propane)
Operating pressure ---------------------------------------------------------------------------------------------- 10.5 to 11.5 in. w.c.
Heat input ---------------------------------------------------------------------------------------------------- 2200 Btu/h @ 11 in. w.c.
Orifice, old style ---------------------------------------------------------------------------------------------------------- 0.190 jeweled
Orifice, new style -------------------------------------------------------------------------------------------------------------------- LP18
Gas ignition ---------------------------------------------------------------------------------- Automatic with flame sensing circuit
Electrode tip-to-burner air gap ----------------------------------------------------------------------------------------- 1/8 to 3/16 in.
4
www.norcold.com/cda
TROUBLESHOOTING – QUICK REFERENCE GUIDE
Problem
Possible Cause
Checks/Reference
The refrigerator does not turn ON.
No 12 Vdc power to refrigerator.
Faulty/loose 12 Vdc connections.
F1 fuse in power board open.
See page 9.
Check 12 Vdc connections.
Check F1 fuse.
The refrigerator does not cool on
AC power.
No AC power to refrigerator.
F3 fuse in power board open.
AC heater failed open.
See page 13.
Check F3 fuse.
Check heaters' resistances.
The refrigerator does not cool
efficiently on AC power.
Ventilation obstructed.
AC voltage low.
Check enclosure for air flow obstructions.
Check AC voltage input.
The refrigerator does not operate
on LP gas.
No LP gas.
Incorrect electrode-to-burner gap.
Faulty spark/sense electrode assembly.
Flame sensing circuit failure.
Check LP gas supply and valves.
Set electrode to 1/8 to 3/16 in.
Replace spark/sense electrode.
Replace power board. See page 40.
The refrigerator does not
cool efficiently on LP gas.
Ventilation obstructed.
Incorrect LP gas pressure.
Dirty burner.
Missing flue baffle.
Flue cap blocked.
Check enclosure for obstructed air flow.
Set gas pressure to 10.5 to 11.5 in. w.c.
Clean burner. See page 28.
Replace flue baffle. See page 27.
Clear flue cap. See page 27.
Poor ventilation.
Off-level operation.
Dirty burner.
Low AC voltage.
Cooling fan inoperative (if present).
Improper installation.
Check enclosure for obstructed air flow.
Level unit. See page 32.
Clean burner. See page 28.
Check AC voltage input.
Test fan operation.
Check installation. See pages 19-23
and 1200 Installation Manual.
"No" "co" fault code.
www.norcold.com/cda
5
DISPLAYED FAULT CODES: S/N 832170 AND LOWER
Probable Cause
Code
Reference
LEDs off
Coldest
Cold
TEMP
SET
ON
OFF
AUTO
Blank
Screen
MODE
AC
LP GAS
Refrigerator turned off.
No 12 Vdc to refrigerator
F1 fuse open.
See page 9.
The burner failed to ignite or reignite.
See page 10.
Flame sense circuit failure.
See page 11.
DC voltage low.
See page 11.
Mode LEDs off
ble
Audi
"no" Flashing
Coldest
Cold
ON
OFF
TEMP
SET
AUTO
Ala
rm
MODE
AC
LP GAS
"LP GAS" LED Flashing
ble
"FS" and "Sr" Flashing
Coldest
Cold
ON
OFF
Audi
TEMP
SET
AUTO
Ala
MODE
AC
rm
LP GAS
"LP GAS" LED Flashing
ble
Audi
"dc" and "LO" Flashing
Coldest
Cold
ON
OFF
TEMP
SET
AUTO
Ala
rm
MODE
AC
LP GAS
ble
Audi
"dc" and "HI" Flashing
Coldest
Cold
ON
OFF
TEMP
SET
AUTO
Ala
AC
See page 12.
LP GAS
ble
Audi
"no" Flashing
Coldest
Cold
ON
OFF
DC voltage high.
rm
MODE
TEMP
SET
AUTO
MODE
AC
LP GAS
Ala
rm
No AC power available to refrigerator.
AC cord not plugged into power board.
F3 fuse open.
See page 13.
"AC" LED Flashing
6
www.norcold.com/cda
Probable Cause
Code
ble
"Sr" and "CL" Flashing
Audi
Coldest
Cold
ON
OFF
Reference
TEMP
SET
AUTO
Ala
MODE
AC
rm
AC relay stuck closed.
See page 12.
AC voltage low.
See page 14.
AC voltage high.
See page 14.
See page 15.
Fresh food compartment door open more than
2 minutes. Lamp switches faulty.
See page 16.
Backup operating system in operation.
See page 17.
LP GAS
"AC" LED Flashing
ble
Audi
"LO" Flashing
Coldest
Cold
ON
OFF
TEMP
SET
AUTO
Ala
rm
MODE
AC
LP GAS
"AC" LED Flashing
ble
Audi
"HI" Flashing
Coldest
Cold
ON
OFF
TEMP
SET
AUTO
Ala
rm
MODE
AC
LP GAS
"AC" LED Flashing
ble
Audi
"Sr" and "OP" Flashing
Coldest
Cold
ON
OFF
TEMP
SET
AUTO
Ala
rm
MODE
AC
LP GAS
"AC" LED Flashing
ble
Audi
"dr"
"dr" Flashing
Flashing
Coldest
Cold
ON
OFF
TEMP
SET
AUTO
Ala
rm
MODE
AC
LP GAS
Temperature LED Flashing
Coldest
Cold
ON
OFF
TEMP
SET
AUTO
MODE
AC
LP GAS
Selected Mode LED "ON"
www.norcold.com/cda
7
DISPLAYED FAULT CODES: S/N 832171 AND HIGHER
Probable Cause
Code
Blank
Display
Screen
Alternating
Reference
Refrigerator turned off.
No 12 Vdc to refrigerator.
F1 fuse open.
See page 9.
The burner failed to ignite or reignite.
See page 10.
See page 11.
DC voltage low.
See page 11.
DC voltage high.
See page 12.
No AC power available to refrigerator.
AC cord not plugged into power board.
F3 fuse open.
See page 13.
See page 12.
AC voltage low.
See page 14.
AC voltage high.
See page 14.
See page 15.
Fresh food compartment door open more than 2 minutes.
Lamp switches faulty.
See page 16.
Backup operating system in operation.
See page 17.
No cooling detected by the controls.
See pages 18
and 32-35.
le
Audib
Alarm
D isplay
le
Audib
Alarm
ble
Alternating
Audi
Display
Alarm
Alternating
Audi
ble
Alarm
Display
Alternating
Audib
Display
Alarm
Alternating
Audib
le
le
D isplay
Alarm
Alternating
Audi
ble
Alarm
Display
ble
Audi
Alternating
Alarm
Display
ble
Audi
Alternating
Alarm
Display
ble
Audi
Alarm
Flashing
Temp
Setting
Alternating
Display
8
ble
Audi
Alarm
www.norcold.com/cda
TROUBLESHOOTING FLOWCHARTS
Blank Display – Refrigerator does not turn on
Before beginning this procedure make sure:
■ The RV DC power system is supplying 10.5 to 15.4 volts to the refrigerator.
■ No other RV appliances or lighting circuits are connected to the refrigerator DC circuit.
■ 12 Vdc input to the power board is wired according to the 1200XX/120X-IMXX Installation Manual.
Fault indicator displayed:
All LEDs off
Coldest
Cold
ON
OFF
TEMP
SET
AUTO
MODE
Blank
Screen
Blank
Screen
on
AC
1 COLD - 9 COLDEST
LP GAS
SET
TEMP
MODE
ON / OFF
Mode LED off
Measure voltage across
power board 12VDC and
GND1 connections.
10.5
to
15.4 Vdc?
NO
1. No DC power input from RV to unit.
2. Faulty wiring or connectors.
YES
Check condition of F1 fuse
in power board. See Figure 3.
F1 fuse okay?
NO
Replace fuse. Refer to
Specifications on page 4.
YES
Measure voltage at optical
control harness. See
Figure 4.
Voltage
present?
YES
NO
Replace power board.
See page 40.
Replace optical control assembly.
See page 41.
F1 Fuse
Wire harness optical
control display connector
Good= 00.0 Ohms
White/violet wire
Bad = OL
White/red wire
10.5 to 15.4 Vdc
87 III TRUE RMS MULTIMETER
00.0
HOLD
RANGE
MIN MAX
4 1/2 DIGITS
1 Seconds
87 III TRUE RMS MULTI METER
H
Hz
REL
PEAK MIN MAX
V
mV
MIN MAX
RANGE
mA
A
V
HOLD
REL
4 1/2 DIGITS
1 Seconds
µA
V
H
Hz
PEAK MIN MAX
mV
mA
A
V
OFF
µA
V
OFF
A
mA µA
V
COM
A
mA µA
V
COM
!
10A MAX
FUSED
400mA MAX
FUSED
V
CAT II
1000V MAX
!
Figure 3. Checking the DC fuse continuity
!
10A MAX
400mA MAX
FUSED
CAT II
1000V MAX
!
FUSED
Figure 4. Measurement points for wire harness voltage
www.norcold.com/cda
9
no LP - no FL Fault Code – Burner failed to ignite or reignite
■ RV LP gas tank valve is open.
■ Refrigerator solenoid gas valve manual shut-off is open.
■ LP gas pressure at the solenoid gas valve pressure tap is 10.5 to 11.5 in. w.c.
Flashing "no"
ON
OFF
ble
ble
Audi
Audi
Coldest
Cold
TEMP
SET
AUTO
Ala
Ala
MODE
rm
rm
on
AC
LP GAS
1 COLD - 9 COLDEST
SET
TEMP
MODE
ON / OFF
Flashing "no" and "FL"
Blinking LP GAS LED
Check burner.
Burner
clean?
NO
Clean and service burner.
See page 28.
YES
Check that electrode-toburner air gap is correct.
Air gap
1/8 to 3/16
inch?
NO
Set electrode-to-burner air gap
1/8 to 3/16 inch.
YES
Check spark/sense electrode
assembly for continuity.
Continuity?
NO
Replace spark/sense electrode
assembly.
YES
Check gas valve solenoid
resistance.
79 to 85 Ω?
NO
Replace gas valve.
YES
Check gas valve solenoid
wires for continuity.
Continuity?
NO
Replace gas valve wires.
YES
Check voltage across power
board terminals GV and
GV_GND.
Voltage
present?
NO
See page 40.
YES
10
Faulty gas valve.
Replace gas valve.
www.norcold.com/cda
Sr FS - Sr Fault Code – Flame sense circuit failure
ble
Audi
"Sr" and "FS" Flashing
Coldest
Cold
ON
OFF
ble
Audi
"Sr" Flashing
Ala
TEMP
SET
AUTO
Ala
rm
MODE
rm
on
AC
1 COLD - 9 COLDEST
LP GAS
SET
TEMP
MODE
ON / OFF
"AC" LED Flashing
See page 40.
dc LO Fault Code – Low dc voltage
Before beginning this procedure:
■ Make sure RV DC voltage to refrigerator is 10.5 to 15.4 volts.
■ Determine if the "dc LO" fault code displays when the converter is the source of DC power.
■ Make sure no other appliance or lighting circuit is connected to the refrigerator DC circuit.
ble
Audi
ble
Audi
Coldest
Cold
ON
OFF
TEMP
SET
AUTO
Ala
Ala
rm
rm
MODE
on
AC
1 COLD - 9 COLDEST
LP GAS
SET
TEMP
MODE
ON / OFF
Check for DC voltage input
to power board terminals
12VDC and GND1.
Voltage
lower than
10.5 Vdc?
YES
NO
Check RV 12 Vdc power supply to
refrigerator.
See NOTE below to determine
and correct low "dc LO" fault.
NOTE
Electronic controls operate on 12 Vdc. When an AC/DC converter is used to
supply DC power, the refrigerator circuit must be connected to the appliance
output terminals of the converter (filtered side).
If the refrigerator circuit is connected to the unfiltered side, the AC ripple
generated by the converter may cause a "dc LO" fault code to display.
To troubleshoot a "dc LO" fault, connect a charged 12 volt automotive battery
to the power board. If the "dc LO" code clears, the fault was caused by
unfiltered DC power.
If the "dc LO" code does not clear, replace the power board (see page 40).
www.norcold.com/cda
11
dc HI Fault Code – DC voltage high
■ Make sure RV DC voltage to refrigerator is 10.5 to 15.4 volts.
■ Determine if the "dc HI" fault code displays when the converter is the source of DC power.
ble
Audi
Coldest
Cold
TEMP
SET
ON
OFF
ble
Audi
Ala
Ala
rm
MODE
rm
on
AUTO
AC
1 COLD - 9 COLDEST
LP GAS
SET
TEMP
MODE
ON / OFF
Check for DC voltage input
to power board terminals
12VDC and GND1.
Voltage
higher than
15.4 Vdc?
YES
Check RV DC power distribution to
refrigerator.
NO
See NOTE below to determine
and correct "dc HI" fault.
NOTE
Electronic controls operate on 12 Vdc. When an AC/DC converter is used to
supply DC power, the refrigerator circuit must be connected to the appliance
output terminals of the converter (filtered side).
If the refrigerator circuit is connected to the unfiltered side, the AC ripple
generated by the converter may cause a "dc HI" fault code to display.
To troubleshoot a "dc HI" fault, connect a charged 12 volt automotive battery
to the power board. If the "dc HI" code clears, the fault was caused by
unfiltered DC power. If the "dc HI" code does not clear, replace the power
board (see page 40).
Sr CL - AC rE Fault Code – AC relay stuck closed
"Sr" and "CL" Flashing
Audi
Ala
Ala
Coldest
Cold
ON
OFF
ble
ble
Audi
TEMP
SET
AUTO
"AC" LED Flashing
MODE
rm
rm
on
AC
1 COLD - 9 COLDEST
LP GAS
SET
TEMP
MODE
ON / OFF
"AC" and "rE" Flashing
See page 40.
12
www.norcold.com/cda
no AC Fault Code – No AC power available
■ No other problems exist with the RV AC power supply.
■ No other appliances or lighting circuits are connected to the refrigerator AC circuit.
■ Extension cords are not being used to supply AC power to the refrigerator.
ble
Audi
"no" Flashing
Coldest
Cold
ON
OFF
TEMP
SET
AUTO
Ala
rm
MODE
AC
Audible
Alarm
LP GAS
"AC" LED Flashing
on
1 COLD - 9 COLDEST
SET
TEMP
MODE
ON / OFF
"AC" and "no" Flashing
Measure voltage at power
board AC cord connection.
108
to
132 Vac?
NO
1. Check AC power input from RV to unit.
2. Check AC power cord.
YES
Check condition of F3 fuse
in power board.
F3 fuse okay?
NO
Replace fuse. See Specifications, page 4.
YES
Check that fuse holder clips
are making full contact with
fuse.
Clips okay?
YES
NO
Adjust clips to ensure fuse contacts are
firm in clips and making full contact.
See page 40.
www.norcold.com/cda
13
AC LO Fault Code – AC voltage low
■ Determine if a certain AC power source sets the "AC LO" fault code (generator, shore power, inverter).
■ Make sure no other appliance or lighting circuit is connected to the refrigerator AC circuit.
■ Make sure extension cords are not being used to supply AC power to the refrigerator.
Audi
Audi
Coldest
Cold
ON
OFF
ble
ble
"LO" Flashing
TEMP
SET
AUTO
Ala
Ala
rm
rm
MODE
on
AC
1 COLD - 9 COLDEST
LP GAS
AC LED blinking
SET
TEMP
MODE
ON / OFF
Flashing "AC" and "LO"
Voltage
lower than
108 Vac?
YES
Fault related to RV AC power distribution
component or circuit supplying AC power
to refrigerator.
NO
See page 40.
AC HI Fault Code – AC voltage high
■ Determine if a certain AC power source sets the "AC HI" fault code (generator, shore power, inverter).
Audi
Audi
Ala
Ala
Coldest
Cold
ON
OFF
ble
ble
"HI" Flashing
TEMP
SET
AUTO
MODE
rm
rm
on
AC
1 COLD - 9 COLDEST
LP GAS
"AC" LED Flashing
SET
TEMP
MODE
ON / OFF
"Sr" and "FS" Flashing
Voltage
higher than
132 Vac?
YES
Fault related to RV AC power distribution
component or circuit supplying AC power
to refrigerator.
NO
14
www.norcold.com/cda
See page 40.
AC HE Fault Code – AC heater failed open
■ RV AC voltage to the refrigerator is 108 to 132 volts.
■ No other appliance or lighting circuit is connected to the refrigerator AC circuit.
ble
"OP and Sr" Flashing
TEMP
SET
ON
OFF
ble
Audi
Audi
Coldest
Cold
AUTO
Ala
Ala
rm
MODE
rm
on
AC
1 COLD - 9 COLDEST
LP GAS
AC LED blinking
SET
TEMP
MODE
ON / OFF
Flashing "AC" and "HE"
Check AC heater wires for
loose or damaged connection.
Heater
connections
okay?
NO
Repair or replace connectors. If
connectors cannot be replaced,
replace heater.
YES
Check AC heater resistance.
See Figure 5.
NO
Resistance
58 to 68 Ω?
Replace AC heater.
YES
See page 40.
58 to 68
each heater
at room temperature
MIN MAX
RANGE
HOLD
REL
4 1/2 DIGITS
1 Seconds
H
Hz
PEAK MIN MAX
mV
mA
A
V
µA
V
OFF
A
mA µA
V
COM
N O RC O L
!
10A MAX
FUSED
400mA MAX
FUSED
CAT II
1000V MAX
!
Yellow
Black
Figure 5. Checking AC heater resistance
www.norcold.com/cda
15
dr Fault Code – Door open for more than 2 minutes
Light/thermistor connector and wire harness connector are fully engaged and locked.
■
ble
Audi
Ala
Ala
Coldest
Cold
ON
OFF
ble
Audi
TEMP
SET
AUTO
rm
MODE
rm
on
AC
LP GAS
1 COLD - 9 COLDEST
SET
TEMP
MODE
ON / OFF
Check that the door latch
striker plate is adjusted
correctly.
Striker plate
okay?
NO
Adjust striker plate.
YES
Check fresh food
compartment door(s) for
vertical play.
Door(s)
aligned
properly?
NO
Install Door Shim Kit, part number 625129.
YES
Check operation of
light/door switches.
Lights off
when switches
pressed?
NO
Replace switch(es).
Magnetic tip screwdriver
16
www.norcold.com/cda
Thermistor Failure Fault – Controls in Backup Operating System mode
■ Make sure lamp/thermistor assembly is connected to the wire harness.
Temp Setting Flashing
Temp Setting Flashing
Coldest
Cold
ON
OFF
TEMP
SET
AUTO
MODE
on
AC
1 COLD - 9 COLDEST
LP GAS
SET
TEMP
ON / OFF
MODE
Check lamp/thermistor wire
assembly and connector for
dirty/broken connections.
Wires and
connector
good?
NO
YES
Clean/repair terminals or connector as
required. See Figure 6.
Check thermistor resistance.
See Figure 7.
Temperature*
(oF)
85
80
75
70
60
50
40
35
33
32
*Approximate Values
HOLD
RANGE
MIN MAX
4 1/2 DIGITS
1 Seconds
H
Hz
REL
Lamp
Connection
PEAK MIN MAX
mV
mA
A
V
µA
V
OFF
mA µA
A
V
COM
!
10A MAX
FUSED
400mA MAX
FUSED
CAT II
1000V MAX
!
Thermistor
Connections
Resistance*
(k )
8.1– 9.0
9.1–10.0
10.1–11.0
11.1–12.0
12.1–13.0
15.5–16.5
22.5–23.5
24.5–25.5
28.5–29.5
30.0–32.0
Thermistor
Thermistor packed in ice bath
Figure 6. Thermistor terminals
and connector
Figure 7. Checking thermistor resistance
Backup Operating System (BOS)
The backup operating system (BOS) is an
electronically controlled duty cycle. It maintains the
refrigerator in operation if the thermistor is
disconnected or fails. The BOS maintains cooling by
controlling the heat source selected. When the
refrigerator is operating in BOS, the length of the
cooling cycle is regulated by time rather than
regulated by temperature.
To accomplish this, the BOS adjusts the length of the
cooling cycle according to the temperature setting
selected by the user; the higher the temperature
setting, the longer the cooling cycle. For example, if
the temperature setting is set to 5, raising the setting
to 6 will lengthen the cooling cycle, making the
cabinet colder.
When a warmer temperature is desired, changing the
temperature setting to a lower number shortens the
cooling cycle. For example, if the temperature setting
is set to 6, lowering the setting to 5 will shorten the
cooling cycle.
1200XX/120X-IMXX Backup Operation, SN 832170
and Lower
When the 1200XX/120X-IMXX controls shift to BOS
operation, the temperature setting flashes until the
refrigerator is no longer in BOS.
1200XX/120X-IMXX Backup Operation, SN 832171
and Higher
When the 1200XX/120X-IMXX controls shift to BOS
operation, the temperature setting flashes for ten
seconds when the TEMP button is pressed. After ten
seconds, the "ON" LED displays.
www.norcold.com/cda
17
no co Fault Code* – No cooling detected by the controls - S/N 832171 and higher
ble
Audi
Ala
rm
on
1 COLD - 9 COLDEST
SET
TEMP
MODE
ON / OFF
"no" and "co" Flashing
Check for cooling at fin
assembly.
Cooling
detected?
NO
1. Check for ventilation obstructions
and leveled operation.
2. Reset power board as shown in
Figure 8 and described in procedure
below.
3. Allow unit to operate normally.
YES
Check for completion of
cooling cycle after resetting
power board.
"no" "co"
code shows
before cycle
end?
YES
* For more information on the "no co" fault code,
see pages 32-25.
Power Board Resetting Procedure
1. Turn OFF the refrigerator.
2. Disconnect the following from power board:
a. 12 Vdc positive and negative wires.
b. AC power cord.
c. Solenoid gas valve wires.
d. Spark/sense electrode assembly wires.
3. Remove the power board cover.
4. Reconnect 12 Vdc positive and negative wire.
5. Turn ON the refrigerator.
6. Locate Pin 15 on 16 pin connector (P1). Pin
15 is the empty socket to the right of the
white/violet wire on the top row. See Figure 9.
7. Using an insulated jumper wire, short Pin 15
to the power board ground lug for 10 - 15
seconds. A click sound will indicate when the
controls are reset. See Figure 8.
NO
Cooling unit is good. Recheck for
ventilation obstructions and leveled
operation.
1. Replace cooling unit if "no co"
shows before completing a full
cooling cycle.
2. Reset power board as shown in
Figure 8 and described in procedure
below.
11. Disconnect the 12 Vdc power positive and negative
wires from the power board.
12. Install the power board cover.
13. Reconnect the following to the power board:
a. Spark/sense electrode assembly wire.
b. Solenoid gas valve wires.
c. AC power cord.
d. 12 Vdc positive and negative wires from the
power board.
14. Place refrigerator in service.
Pin 15
Ground
NOTE
A jumper wire to short Pin 15 to ground can be made
from a six inch long insulated 22 AWG wire with a 1/2
inch of insulation stripped from each end.
9. Turn ON refrigerator. If "no co" code displays,
repeat steps 7 - 9.
18
Grounding probe
or jumper wire
Figure 8. Resetting the power board
www.norcold.com/cda
VENTILATION
Roof Exhaust Venting
NOTE
The general guidelines for intake vents and roof exhaust
vents presented in this section do not replace the
instructions and/or guidelines provided in the 1200XX/
120X-IMXX Installation Manual and the Ventilation
Guidelines For Gas/Electric Refrigerators, part number
622090A (3-01). Refer to the 1200XX/120X-IMXX
Installation Manual and Ventilation Guidelines For Gas/
Electric Refrigerators for the latest information on
approved vents, installation instructions, and special
construction exceptions.
Air Intake Vent
The ventilation and combustion air flows into the
enclosure through the air intake vent. See Figure 9.
The space between the air intake vent and the rear of
the refrigerator must be kept clear at all times. Any
obstruction in this area may cause serious ventilation
problems. The air intake vent opening also provides
access for servicing cooling unit components.
Roof Exhaust Vent
The heat absorbed by ventilation air and combustion
gases flow out of the enclosure through the roof
exhaust vent. See Figure 9.
The roof exhaust vent is equipped with a nonremovable metal mesh screen that prevents leaves,
debris, birds or rodents from getting into the enclosure.
The roof cap is fastened to the exhaust vent with four
screws. The cap is always installed with the slope
towards the front of the RV.
RV front
Roof exhaust vent
Exhaust vent screen
Baffle
Full width of enclosure
to isolate the top of refrigerator
from rejected heat
1/4 inch
or less
Condenser
1/8 inch maximum
(if wider see Figure 10, page 20)
Baffles required
when opening
between outside wall
and cooling unit
is over 1 inch.
Fans (2)
Absorber coils
Must be
between
3 and 4
inches
Intake vent
Figure 9. Roof exhaust venting arrangement
www.norcold.com/cda
19
Roof exhaust vent
Top baffle required
when the clearance
from the underside
of the roof to the
top of the refrigerator
exceeds 1/4 inch.
Condenser
Side wall baffles
required when the
clearance between the
enclosure side walls
and refrigerator
exceeds 1/8 inch
Fans (2)
Absorber coils
Intake vent
Roof vent
Figure 10. Back view–roof exhaust venting
Angle must
not exceed
45 degrees
Baffles
The minimum and maximum clearances for installing
the refrigerator or correcting ventilation problems on
roof vented units are listed in Table 1 below. Baffles are
required whenever installations exceed maximum
clearances listed in Table 1. Figure 10 and Figure 11
show baffle locations.
Minimum
0 inch
Sides (each)
0 inch
1/8 inch
Top
0 inch
1/4 inch
Rear
0 inch
1 inch
Baffles required
when opening
between outside
wall and cooling
unit is over 1 inch
Maximum
0 inch
Intake vent
Table 1. Clearances for roof vented installations
20
1/4 inch
or less
Condenser
Vertical Angled Baffles
Vertical angled baffles are required when the roof
exhaust vent is installed inboard of the condenser.
Figure 11 shows the angled vertical baffles required on
inboard roof vent installations. The horizontal wall
baffles are required whenever the distance between the
cooling unit and the interior surface of the outside wall
exceeds one inch.
Bottom
Angled baffles
required when
the roof exhaust
vent is inboard
of the condenser
Figure 11. Baffles required for an inboard
roof exhaust vent installation
www.norcold.com/cda
Double Sidewall Venting
NOTE
The general guidelines for intake vents and roof exhaust
vents presented in this section do not replace the
instructions and/or guidelines provided in the 1200XX/
120X-IMXX Installation Manual and the Ventilation
Guidelines For Gas/Electric Refrigerators, part number
622090A (3-01). Refer to the 1200XX/120X-IMXX
Installation Manual and Ventilation Guidelines For Gas/
Electric Refrigerators for the latest information on
approved vents, installation instructions, and special
construction exceptions.
Because of increased installation of refrigerators in RV
slide outs, NORCOLD has developed venting
guidelines for double sidewall vent applications. This
ensures NORCOLD refrigerators meet the ANSI Z21.19
standards for cooling performance when used in slide
out applications.
Two baffles are required for the 1200XX/120X-IMXX
model in double sidewall venting applications. It should
be noted that baffle arrangements are different if the
enclosure depth is greater or less than 26 inches. The
baffle configurations are shown in Figure 12, page 22,
and Figure 13, page 23.
Air Intake Vent
The ventilation and combustion air flow into the
enclosure is through the air intake vent. See Figure 12,
page 22, and Figure 13, page 23.
Sidewall Exhaust Vent
The heat absorbed by ventilation air and combustion
gases flow out of the enclosure through the sidewall
exhaust vent. See Figure 1, page 22, and Figure 13,
page 23 for details.
The challenge with slide out installations is that the
"chimney effect" (see page 32) that is present with roof
vent installations is not as strong in slide outs. To
improve the airflow of the chimney effect, sidewall vent
installations must have fans and baffles. These fans
and baffles direct the air flow through the surfaces of
heat rejecting components. NORCOLD has determined
that the following three key design considerations
optimize heat removal in slide out applications.

Refrigerators installed in slide outs must have a fan
or fans to assist air flow. All 1200XX/120X-IMXX
refrigerators have two factory-installed fans.

Fresh air must be directed to flow through the
surface areas of the absorber coils, condenser fins,
and the outer surface of the canister.

Corners and structural pockets where heated air
may stagnate must be reduced in size or
completely eliminated.
www.norcold.com/cda
21
Aluminum or galvanized steel sheet
full width baffle
full width baffle
32.69
62 in.
63.38 in.
Figure 12. Baffle arrangement for enclosures depths of more than 24 inches and less than 26 inches
22
www.norcold.com/cda
full width baffle.
.
Aluminum, wood, or galvanized steel sheet
full width baffle.
32.69
63.38
Figure 13. Baffle arrangement for enclosures with depths of 26 inches or greater
www.norcold.com/cda
23
LP GAS SYSTEM
Canister
Baffle
Gas valve
Power connections
Solenoid
Flue
Burner tube
Electrode
Burner
Test port
(1/8" NPT plug)
Burner box
0.190
Jeweled orifice
Bracket
ON
Manual shutoff
(shown open)
Figure 14. LP gas system, units with S/N 882583 and lower
Canister
Baffle
Power connections
Gas valve
Burner tube
Flue
Electrode
Gas inlet port
Burner
N18 orifice assembly
Burner box
OFF
OPEN
Gas outlet port
Manual shutoff
(in "OFF" position)
Test port
Figure 15. LP gas system, units with S/N 882584 and higher
Pressure Requirements
!
WARNING:
When working on or near the LP gas system:
Do not smoke or light fires! Extinguish all open
flames!
Do not use an open flame to leak test any of the
LP gas system components. LP gas is highly
flammable and explosive.
Do not connect the refrigerator directly to the LP
gas tank. Always use an approved pressure
regulator between the LP gas tank and the
refrigerator LP gas system.
The refrigerator LP gas system, shown in Figures 14
and 15, is for propane gas use only. The system
working pressure is 10.5 to 11.5 in. water column.
Propane gas pressures below 10.5 in. w.c. or above
11.5 in. w.c. will affect heat output which will directly
affect cooling efficiency.
Propane gas flow control is monitored electronically by
the control's flame sensing circuit. If the flame sensing
circuit does not detect a burner flame within 30
seconds after initiating ignition, power to the gas valve
is turned off and gas mode operation is locked out.
To prevent damage to connections, piping, and
components, always use two wrenches to tighten
or loosen connections. Damaged connections,
piping, and components create the potential for
gas leaks.
24
www.norcold.com/cda
Testing for LP Gas Leaks
!
WARNING:
Do not wet or spray liquids on or near electrical
connections or electronic components. Many liquids,
including leak detection solutions, are electrically
conductive and can create an electric shock hazard,
short electrical components, and/or damage electronic
circuits.
!
CAUTION:
Do not use leak test solutions that contain ammonia
or chlorine. Ammonia and chlorine attack copper and
brass components.
Leak testing can be accomplished using an electronic
leak detector or a commercial grade leak test solution.
The use of homemade soap and water leak test
solutions should be avoided if possible. When applying
a leak test solution, apply the solution over the entire
joint using a small brush or spray applicator.
Due to low system operating pressure, it may take a
few minutes for bubbles to appear if the connection is
leaking. Hidden joints should be examined thoroughly
using an inspection mirror.
Components
!
Solenoid Gas Valve
The electronic controls automatically opens and
closes the solenoid gas valve. The solenoid gas valve
also has a manual shut-off and capped pressure test
port. The valve's manual shut-off is a spring-loaded,
quarter turn manually operated valve. See Figures 16
and 17.
To manually shut off gas to the burner, pull the handle
slightly away from the body of the valve, then turn it
one-quarter, turn (90 degrees) counterclockwise.
Units with serial numbers lower than 657908
(manufactured before 02/16/99) are equipped with the
old style solenoid gas valve. See Figures 16 and
Figure 18, page 26.
Units with serial numbers 657908 and higher
(manufactured on or after 02/16/99) are equipped with
the new style solenoid gas valve. See Figure 17 and
Figure 20, page 26.
Solenoid Gas Valve Connections
For both the old and new style valves, the solenoid gas
valve inlet fitting is 3/8 inch, with male threads; the
outlet fitting is 1/4 inch, with male threads.
Replacing Old Style Gas Valve
When replacing an old style solenoid valve with a new
style valve, use the NORCOLD gas valve conversion
kit, part number 621334. This kit contains the new
style solenoid gas valve, the required hardware, and
instructions.
CAUTION:
When working on the refrigerator LP gas system:
Do not alter or modify the burner tube antivibration loop.
Do not cross thread fittings. Exercise extreme
care when connecting and disconnecting fittings.
Leak test all of the refrigerator propane gas
system fittings after service, replacement, or
repair.
Solenoid
Bracket
12 Vdc connections
Solenoid
Power
connections
Pressure test port
(1/8" NPT plug)
Bracket
ON
3/8" Inlet fitting
OPEN
Inlet port
Test port
Manual shutoff valve
(in "OFF" position)
Manual shutoff
(shown open)
Figure 16. Old style solenoid gas valve (SN<657908)
Outlet port
OFF
1/4" Outlet fitting
Figure 17. New style solenoid gas valve
(SN>=657908)
www.norcold.com/cda
25
OPEN
OFF
Old style solenoid
Test port
Bracket
Figure 18. Components of new style solenoid gas
valve
Manual shutoff
ON
Figure 20. Components of old style solenoid gas
valve
Orifice
Retaining screw
5-slot burner
WARNING:
Do not separate orifice from its adapter. Separating
the assembly breaks the seal and will cause LP gas
to leak.
The orifice (see Figure 21) controls the flow of propane
gas to the burner. 1200XX/120X-IMXX units with serial
numbers 882583 and lower use the 0.190 jeweled style
orifice. See Figure 22. Units with serial numbers
higher than 882583 use the N18 cap style orifice. See
Figure 23. Installing a smaller, larger, or damaged
orifice will affect combustion.
Burner
The burner, shown in Figure 21, houses the orifice,
provides primary air for combustion, and is the fuel
mixing chamber. Primary combustion air flows into the
burner through the three primary air intake holes.
Carbon deposits on the burner slots is the main cause
of no cooling or poor cooling performance when the
refrigerator operates in the LP gas mode.
Orifice assembly
Primary air intake holes (3)
Figure 21. Burner assembly and orifice
Size stamped on flat
Burner Tube
The burner tube is 1/4 inch OD aluminum tubing with
an anti-vibration loop. Each end of the tube is doubleflared. See Figure 19.
Burner connection
Jewel
0.190
!
Figure 22. 0.190 jeweled orifice
Size stamped on orifice end
1
P
L
8
Gas valve connection
Figure 19. Burner tube
26
Figure 23. N18 orifice
www.norcold.com/cda
Flue
The flue comes equipped with a removable baffle and
a metal flue cap. The flue on the 1200XX/120X-IMXX
model ends a few inches above the canister. See
Figure 24.
Flue
cap
Baffle
suspension
wire
The flue, along with the baffle, should be checked
annually. In roof exhaust venting applications, the
refrigerator must be removed from the enclosure to
check or service the flue or any of its components.
In most sidewall exhaust venting applications, removal
of the sidewall exhaust vent provides clear access to
service the flue or any of its components.
Flue Cap
The flue cap, see Figure 24, deflects hot exhaust
gases to the sides. It also keeps dirt and debris from
getting into the flue. Cooling performance may be
affected if the flue cap is not installed or is not
installed correctly.
Flue Baffle
The flue baffle, see Figure 25, traps and transfers heat
to the cooling unit generator.
A retaining wire suspends the flue baffle in the flue,
just above the flame. See Figure 24. The flue baffle
should be checked annually. In roof vented
installations it is necessary to remove the refrigerator
from the enclosure to check the flue baffle. To remove
the flue baffle from the flue:
Flue
tube
Flue
Canister
Baffle
Serial Number
NORCOLD
Burner
box
Electrode
700000
Made in USA
Burner
tube
Burner
Orifice
Figure 24. Flue and components
Retaining wire
1. Remove the flue cap.
2. Unclip the baffle retaining wire from the rim of the
flue.
3. Pull the baffle out of the flue tube.
!
CAUTION:
Baffle
Do not cut or modify the flue baffle retaining wire!
The wire positions the baffle for optimal heat transfer.
Figure 25. Flue baffle
Flame Appearance
The flame should be light blue with sharp blue root
cones and a steady burning flame plume. See Figure
26.
Light blue steady flame
with sharp blue cones
A flame that is mostly orange or yellow, is erratic, and/
or unstable, indicates a "dirty" burner. Burner cleaning
procedures appear on page 26.
Figure 26. Flame appearance
www.norcold.com/cda
27
Burner Cleaning Procedure
!
!
WARNING:
Burn hazard! Allow the burner box and burner
components to cool before attempting to service the
burner assembly or components.
1. Turn OFF power to the refrigerator.
2. Close the LP gas tank valve.
For steps 3 - 5, refer to Figure 34, page 36.
3. Close the combination gas control valve manual
shut-off.
4. Remove the drip cup.
!
CAUTION:
To prevent damage to connections, piping, and
components, always use two wrenches to loosen the
burner tube. A damaged burner tube creates a
potential for gas leaks.
5. Remove the burner box cover.
For steps 6 - 8, refer to Figures 14 and 15, page
24.
6. Disconnect the burner tube from the orifice
assembly.
7. Remove the orifice assembly from the burner.
8. Remove the burner retaining screw.
9. Remove the burner from the burner box frame.
10. Clean the burner.
NOTE
Clean the burner slots free of carbon. The inner bore
of the burner body may be cleaned with a 3/16 in,
double-spiral wire brush. Do not damage the threads
when cleaning the inner bore of the burner.
WARNING:
Do not insert any type of cleaning tool or wire into the
orifice. Do not drill or ream the orifice opening to clean
it. Insertion of any type of cleaning tools, reaming, or
drilling through the opening will alter the volume of LP
gas flow to the burner and creates a fire hazard
potential.
11. Visually inspect the orifice. If dirty, wash the
assembly with alcohol, then allow to air dry. If
cleaning fails to remove dirt or if the condition of
the orifice assembly is questionable, replace the
orifice assembly.
12. Clean dirt or debris from the burner box base.
13. Reinstall the burner. Do not overtighten the
retaining screw.
!
CAUTION:
To avoid gas leaks and prevent damage to
connections, piping, and components, always use
two wrenches to tighten the burner tube. A damaged
burner tube creates a potential for gas leaks.
14. Install the orifice assembly. Thread the orifice
assembly into the burner finger tight, then finish
tightening using two wrenches.
15. Connect the burner tube. Thread the fitting finger
tight, then finish tightening using two wrenches.
16. Install the burner box cover. Do not overtighten the
retaining screw.
17. Open the LP gas tank valve.
18. Open the solenoid gas valve manual shut-off.
19. Turn ON the refrigerator and select the LP Manual
Mode operation.
20. Leak test LP gas connections during the 30
second trial-for-ignition.
!
WARNING:
Do not attempt to repair LP gas leaks with the
refrigerator in operation. Before attempting to repair a
gas leak:
Turn OFF the refrigerator.
Close the LP gas valve and the solenoid gas valve
manual shut-off.
28
www.norcold.com/cda
ELECTRICAL REQUIREMENTS AND COMPONENTS
DC Voltage Requirements and Polarity
The operating controls require 10.5 to 15.4 Vdc to
operate. The positive wire lead (+) connects to power
board terminal 12VDC; the negative wire lead (–)
connects to terminal GND1.
Power Board DC Fuse
!
WARNING:
Never replace a fuse with a higher amp rated fuse.
Always use the specified fuse.
The controls circuit fuse is a standard automotive
blade type fuse. It is located on the power board,
terminal F1.
DC Power Wiring Requirements
!
WARNING:
Never use undersized wires to supply DC power to
the power board. The use of undersized wires can
cause low voltage and high amp draw conditions. The
high amp draw caused by a circuit using undersized
wires will cause the wire to overheat and creates an
electrical fire hazard.
Lamp/Thermistor Assembly
The operation of the fresh food compartment 12 Vdc
lamp is controlled by two switches mounted on the top
of the fresh food cabinet and activated by the fresh
food cabinet doors.
Leaving the door ajar or open for more than two
minutes causes the controls to display a "dr" fault
code. Closing the door turns off the light and clears the
"dr" fault from the display. The fault code is stored in
the diagnostic mode nonvolatile memory. For "dr"
troubleshooting procedures, see page 16. As shown in
Figure 27, the light assembly harness and thermistor
share the same connector.
On older models (SN 832170 and lower), the
thermistor is attached to the twentieth fin from the
right on the fin assembly. On models SN 832170 and
higher or models that have had a new style power
board installed, the thermistor is attached to the
second fin from the right. The thermistor senses fin
temperature, which can be accessed through the
Diagnostic Mode, pages 48 and 50. If the thermistor
fails, the controls will activate Backup Operation
System, page 17.
Connector
Light bracket
18 AWG is the minimum AWG size wire that can be
used for connecting DC power to 2-way models. The
fuse size for overload protection must not exceed 6
amps.
Lightbulb
Light cover
AC/DC Converter as Power Source
The power board must be supplied 12 Vdc only from
the filtered output (battery side) of a converter.
Unfiltered voltage (commonly referred to as AC ripple)
output of AC/DC converters can cause the electronic
controls to set false fault codes. It can also turn off the
refrigerator or prevent the refrigerator from turning off.
Clip
Thermistor
Figure 27. Lamp/thermistor assembly
Divider Heater
The divider heater is permanently "foamed" between
the divider separating the freezer and fresh food
compartment. The controls constantly monitor power
board voltage output to the heater through built in
diagnostics (see pages 47 and 51). Turning the
refrigerator on automatically energizes the heater.
www.norcold.com/cda
29
AC Power Requirements
!
WARNING:
Electric shock hazard! The refrigerator receives
power from more than one source. Unplug the AC
cord from the RV AC receptacle before servicing
electrical or electronic components.
AUTO AC and AC Manual Mode operation require 108
to 132 Vac. AC power must be supplied through a 2
pole/3 wire/20 amp grounding type receptacle.
When replacing the AC heater make sure the stop
bead rests fully against heater tube rim. Figure 28
shows the location of the stop bead.
AC Heater Circuit Fuse
The AC circuit fuse is a fast acting 5 amp 1/4" x 11/4"
AGC type. It is on the power board, terminal F3.
Power Board AC Power Cord
!
AC Heaters
!
WARNING:
Do not wire the heater direct! Wiring the heater
directly bypasses control safety devices and creates
the potential for an electrical fire.
The two AC heaters (see one heater pictured in Figure
28) are cartridge type heaters. The heaters are each
rated for 225 watts @ 120 Vac. Each heater's nominal
resistance is 64 Ohms.
Heater data
WARNING:
The following warning is present on each AC
cord and should be strictly followed: This appliance
is equipped with a three-prong (grounding) plug for
your protection against shock hazards and should be
plugged into a properly grounded three-prong
receptacle. Do not cut or remove the grounding prong
from this plug.
The power board is supplied AC power through the
black AC power cord. See Figure 29. Do not modify or
cut the cord's grounding prong. Always make sure that
ground wire (green wire) is tightly fastened to the
refrigerator cabinet metal plate. The rounded side of
the AC cord's power board connection must be
connected to the power board with the rounded side
facing left.
Stop bead
Black wire
Power board
connection
Yellow wire
Figure 28. AC heater
When there is poor or no cooling in AUTO AC or AC
Manual Mode:
a.
b.
c.
Ground wire
Measure AC voltage input to the power board.
Measure heater amp draw.
If amp draw is not as specified, measure the
heater's resistance at ambient temperature.
NOTE
Figure 29. Power board AC power cord
Heater resistance must be measured at ambient
temperature.
30
www.norcold.com/cda
Ice Maker AC Power Cord - Earlier Models
On earlier models, the ice maker power cord and the
AC power cord are connected as one unit. Figure 30
shows the AC power cord for earlier models without
ice makers (Figure 30a), and the AC power cord for
earlier models with an ice maker (Figure 30b).
Ice Maker AC Power Cord - Later Models
The ice maker is supplied AC power through the white
AC power cord, which is separate from the power
board AC cord. The cord and its connections to the
ice maker wire harness are shown in Figure 31. The
ice maker cord can be detached from the power board
AC cord by cutting the two plastic cable ties holding
them together.
(b)
Smooth black lead
to black ice maker wire
(a)
12 Vdc Ventilation Fans
The two ventilation fans are located on top of the
absorber coils on the back of the refrigerator. They are
attached to the absorber coils by brackets and
mounting screws. See Figure 32. Ventilation fans are
supplied 12 Vdc through power board connections.
NOTE
Although the power board supplies power to the fans,
it does not control the fans' operation. Fan operation
is controlled by the fan thermostatic switch located
on the condenser.
Fan operation is automatically controlled by a
thermostatic switch. The thermostatic switch is
mounted on the first condenser fin. See Figure 33. The
switch turns the fan on when the temperature is
approximately 130 °F. The switch turns the fan off
when fin temperature drops to approximately 115 °F.
Fan mounting screws
Ribbed black lead
to white ice maker wire
Ground wire
REFRIGERATORS WITH ICE MAKERS
Ground wire
REFRIGERATORS WITHOUT ICE MAKERS
Bracket mounting screws
Figure 30. AC power cord - older models
Figure 32. Fans mounted on the top absorber coil
To ice maker
wire harness
To red fan wire
Thermostatic switch
Ground
To refrigerator metal plate
First fin
From power board
Ribbed wire/female connector
To white ice maker wire
Figure 33. Fan thermostat
Short white wire/female connector
To water valve solenoid
Smooth wire/male connector
To black ice maker wire
Brown wire/female connector
To water valve solenoid
Figure 31. Ice maker power cord
www.norcold.com/cda
31
COOLING UNIT
Description
Gradual Decrease in Cooling Efficiency
The cooling unit is a self-contained gravity flow
absorption refrigeration system. The refrigerant charge
is a solution of water, ammonia, sodium hydroxide,
and sodium chromate (a corrosion inhibitor).
Refrigeration is accomplished by applying heat energy
and venting the heat extracted from the freezer and
fresh food cabinet while maintaining the unit leveled.
A gradual decrease in cooling efficiency can be caused
by the following factors:
Heat Absorption
The refrigerant transfers the heat from the freezer and
the food cabinet to the absorber coils. At the absorber
coils the metal surface absorbs the heat and air flow
over the external surfaces of the coils carries away the
heat. A thermal air current is created by the rising hot
air and flows out of the enclosure through the roof
exhaust vent or sidewall exhaust vent (depending on
installation). The flowing air mass passes over the
surface of the condenser fins where it absorbs heat
transferred from the ammonia vapors flowing through
the condenser.
The thermal airflow process creates a "chimney
effect." The fresh air drafted by the chimney effect
through the intake vent removes rejected heat,
supports combustion, and expels the exhaust gases
produced by the combustion process. Any obstruction,
restriction, or modification to vents or the enclosure
will affect the cooling cycle. Poor cooling unit
performance may be due to:

Loose insulation interfering with the ventilation
process.
Construction material or debris left in the
enclosure.
Insect screening covering vents.
Plastic sheeting covering vents.
Items stored in the enclosure.
Modifications to vents or enclosure.
No roof or sidewall exhaust vent opening.
Information pertaining to ventilation and enclosure
requirements appears on pages 19-23.
Leveled Operation
The circulation of the refrigerant through the cooling
unit is accomplished by gravity flow; therefore, the
refrigerator must be operated leveled. Off-level
operation will effect the flow of the refrigerant through
the cooling system. The maximum off-level operation
limits are:
3 degrees from side-to-side.
6 degrees from front-to-back.
Exceeding the maximum off-level limits can
permanently damage the cooling unit.
Ventilation obstruction.
Heat source failure.
Off-level operation.
Lack of service or maintenance.
Inadequate repairs.
Unauthorized field modifications.
Cooling unit failure.
Note that a gradual decrease in cooling efficiency is
not always an indication of cooling unit failure. If any of
these factors exist and are not corrected, a
replacement cooling unit will also perform inefficiently
or fail.
Step-by-step troubleshooting is the best approach
when dealing with a gradual decrease in cooling. It is
important to consider that the cooling unit is working,
though not efficiently. A Cooling System Diagnostic
Flowchart can be found on pages 34 and 35. The
cooling unit must reach peak efficiency before
troubleshooting can take place. It takes an average of
four hours for the refrigerant to reach peak efficiency.
This time frame depends on ambient air temperature.
Additionally, ambient air temperature plays a
significant role if the unit was not installed correctly.
Incorrect installation leads to poor ventilation, which in
turn relates to poor cooling performance.
The unit's service and maintenance history should also
be considered when checking a cooling unit for poor
cooling performance. The service history and the
scope of service work performed may lead directly to
the cause and resolution of a cooling problem.
Cooling Performance Monitoring Control
Units with Serial Numbers 832171 and Higher Only
The Cooling Unit Monitoring Control monitors the fin
assembly temperature through the thermistor. This
control activates when the refrigerator is turned on or if
the fin temperature rises above 40° F. When the
temperature is above 40° F and a change in cooling is
not detected in a specific amount of time, the
refrigeration heat sources are turned off. The Cooling
Unit Monitoring Control will not activate if:
The fin assembly temperature stays below 40° F.
If the thermistor is disconnected, open, or shorted.
If the fresh food compartment door is sensed open
(resampling starts when door closes).
The cooling unit or its performance are not affected
when the vehicle is in motion.
32

The AC heater is open.
AC voltage is low.
Frost management is active.
www.norcold.com/cda
Cooling Unit Monitoring Control Operation
The Cooling Unit Monitoring Control operates in the
following sequence:
1. Because the fin temperature is above 40° F when
the refrigerator is turned ON, sampling begins
when the refrigerator is turned ON and stops when
the temperature falls below 40° F.
2. The Control activates when the fin temperature
rises above 40° F while the refrigerator controls are
demanding cooling.
3. The Control samples the fin temperature every ten
minutes for a period of two hours.
4. If there is no decrease in temperature in this twohour time period, the Control turns off the active
refrigeration heat source.
5. After ten minutes, the Control restarts the heat
source and monitors the fin temperature every ten
minutes for another 40 minutes.
6. Within this 40-minute time period the temperature
must decrease or the Control will turn off the
refrigerator and lock out the heat sources.
7. Once the heat sources have been locked out, the
optical control assembly displays the “no co” fault
code and an audible alarm sounds.
First "no co" Fault Code
The first time the “no co” fault code appears on the
optical control assembly, it can be cleared by the user
by turning the refrigerator OFF and then back ON. This
gives the user the opportunity to check for problems
that may have caused a "no co" code, such as
obstructed ventilation. This fault code occurrence is
then stored in the controls. If the refrigerator
completes a full cooling cycle after the user turns it
back on, this fault code occurrence will be cleared
from the controls.
Refrigerant Leakage
!
WARNING:
Do not operate the refrigerator if the cooling unit is
leaking or leakage is suspected.
Yellow powder or liquid deposits at the rear of the
refrigerator or ammonia smell inside the refrigerator
indicate refrigerant leakage. Exercise extreme care
when handling a leaking or a suspected leaking
cooling unit. The cooling system refrigerant solution
consists of water, ammonia, sodium hydroxide, and
sodium chromate.
Disposal of Cooling Unit
!
WARNING:
Do not, under any circumstances, release any waste
or residue directly into sewers or surface waters. If
any liquid leaks or spills from the cooling unit, contact
the nearest environmental services for guidance.
Dispose of cooling unit according to local, state, and
federal guidelines and regulations. Dispose of any
liquid waste or residue according to pre-emergency
planning and all applicable local, state, and federal
regulations.
NOTE
"No co" fault code occurrences are not stored in the
built-in diagnostic stored fault history accessible
through the Diagnostic Mode. Instead they are stored
in a separate, unaccessible stored fault history.
If the refrigerator does not complete a full cooling cycle
after the user turns the refrigerator back on, a power
board reset is required. The power board reset must be
performed by a service center according to the
procedure on page 18.
www.norcold.com/cda
33
Cooling System Diagnostic Flowchart
!
WARNING:
Do not bypass or modify the refrigerator’s controls
or components to diagnose the cooling system. Do
not wire the heater directly. The heater is supplied
power through a fused circuit.
!
Check cooling unit.
YES
Replace cooling unit.
See page 36.
WARNING:
Do not operate the refrigerator if the
cooling unit is leaking or a leak is
suspected.
Signs of leak(s):
■ Yellow residue inside or at the rear of the
refrigerator.
■ Ammonia smell.
Any signs of leak?
NO
NO
Correct ventilation to meet
installation requirements.
Ventilation as
per installation
instructions?
YES
Correct heat input device to
meet specifications.
Check heat input.
NO
Check (as required):
AC heater voltage and amp draw.
Burner, orifice, flue, deflector cap, flue baffle.
LP gas pressure.
■
■
■
Level refrigerator as outlined
in Owner's Manual and
"Specifications."
NO
Maximum off-level limits:
■ 3 degrees side to side.
■ 6 degrees front to back.
Heat input device
operating within
specification?
YES
Refrigerator
operating leveled?
YES
Continued on page 35.
34
www.norcold.com/cda
!
WARNING:
Do not operate the
refrigerator if the cooling unit
is leaking or a leak is
suspected.
From page 34.
Check condition of door gaskets.
NO
Repair/replace door as
required.
Door gaskets
sealing properly?
YES
Recheck cooling unit for leaks.
YES
See page 36.
Any signs of
leakage present?
NO
Test cooling unit
performance.
NO
See page 36.
Cooling detected?
Visual and audible signs of leak(s):
■ Yellow residue on the rear of the refrigerator.
■ Ammonia smell.
■ Gurgling noise (not always present).
Cooling unit performance test:
1. Disconnect thermistor from the wire harness.
2. Set temperature setting to the coldest setting.
3. Place thermometer in freezer.
4. Allow unit to operate for 3-4 hours.
5. Measure temperature.
The back of the freezer plate
should be cool after 3-4 hours of
continuous operation.
YES
Unit is operating normally.
YES
Refrigerator
temperatures
normal?
Temperatures given below are based on 90 °F ambient
temperature, correct ventilation, and operation at coldest
setting for a period of 8-12 hours.
■ Freezer -5 °F to -10 °F.
■ Fin temperature 18 °F to 25 °F.
NO
Check thermistor and
power board operation.
See pages 17 and 18.
www.norcold.com/cda
35
Replacing the Cooling Unit
Foam
plug
Wire
harness
Condenser
Cable ties
Ice maker
water line
Fans
Absorber
coils
Power
board
Liquid
heat
exchanger
AC
cord
Serial Number
NORCOLD
700000
Made in USA
Drip
cup
Gas
valve
Burner
box
Water valve
Figure 34. Cooling unit and components
Ice maker and/or dispenser models
NOTE
a. Disconnect the ice maker AC power cord from the
RV outlet.
This procedure supplements the instructions packaged
with 1200 model replacement cooling unit. Follow the
procedure thoroughly to install the cooling unit correctly.
Incorrect installation, adjustments, or modifications will
affect cooling performance.
Removing the Refrigerator and Cooling Unit
Refer to Figure 34 to locate components.
1.
2.
3.
4.
5.
6.
36
Turn refrigerator OFF.
Close the LP gas tank valve(s).
Disconnect 12 Vdc from RV DC distribution panel.
Disconnect DC power supply from power board.
Unplug AC power cord from RV AC receptacle.
Disconnect the RV LP gas supply line from the
gas valve.
b. Close the water supply valve to the ice maker.
c. Disconnect the RV water supply line from the ice
maker/dispenser water valve.
7.
8.
9.
10.
Remove rear mounting flange screws.
Remove trim pieces.
Remove upper and lower mounting bracket screws.
Remove any other mounting screws present in the
breaker.
11. Remove the refrigerator from the enclosure.
www.norcold.com/cda
Removing Cooling Unit
a. Disconnect the ice maker water line from the
water fill tube and dispenser water line from
reservoir.
b. Disconnect the ice maker wire harness wires
(white and brown wires) from the water valve
solenoid.
c. Disconnect the ice maker wire harness ground
wire.
d. Remove the two water valve mounting screws
and plastic spacers, then remove the water valve.
1. Remove the fan, bracket assembly, thermostat,
and fan wiring from the cooling unit.
2. Remove the drip cup retaining screw, then remove
the drip cup.
3. Remove the burner box cover retaining screw, then
remove the cover.
4. Disconnect the burner tube from the gas valve.
5. Remove the burner retaining screw, then remove
the burner tube along with the burner.
6. Disconnect the gas valve wires from the power
board.
7. Remove the gas valve bracket screws (3), then
remove the gas valve assembly.
8. Remove the spark/sense electrode assembly
retaining screw, then remove the spark/sense
electrode assembly from the burner box.
9. Remove the burner box retaining screws (2), then
remove the burner box.
10. Disconnect the AC power cord from the power
board.
11. Remove the flapper heater wires.
12. Remove the power board cover retaining screws
(3), then remove the cover.
13. Disconnect the AC heater wires from power board
terminals AC_HT -LO1 and AC_HT_HI.
14. Detach the thermistor from the 2nd condenser fin.
15. Cut both the lower and upper cable ties holding the
wire harness to the foam plug.
16. Remove the ice bin and freezer shelves.
17. Remove the freezer plate retaining screws (eight
retaining screws and washers - four in each
freezer).
18. Remove the seven retaining screws from the fin
assembly.
19. Cut the tape that seals the four edges of the foam
plug.
20. Remove the absorber bracket retaining screws.
21. Remove the condenser retaining screw. See Figure
35, page 38.
22. Separate the cooling unit from the refrigerator
cabinet. To separate:
a. Grab the cooling unit by the liquid heat exchanger.
b. Pull cooling unit upward at a slight angle to unseat
the foam plug.
23. Remove the cooling unit from the cabinet.
Installation of Replacement Cooling Unit
1. Clean the old sealant from the back of the
evaporator plate, fin assembly, and cabinet step.
!
CAUTION:
Use only the NORCOLD approved sealant that is
packaged with the new cooling unit. Do not use silicon,
latex, or other sealant, which may cause damage to
the foam and will greatly reduce cooling efficiency.
NOTE
The sealant must be applied correctly to prevent air
from being drawn into the cooling unit's high and low
evaporators.
2. Apply a 1/2 inch bead of sealant to the
replacement cooling unit's low and high
temperature evaporators, and to the foam plug
step. See Figure 36, page 38.
3. Insert the drip tube through the foam block
opening.
4. Mate the cooling unit foam plug section to the
cabinet step opening. The foam plug must seat
evenly against the cabinet step.
5. Install the condenser retaining screw. Do not
overtighten the condenser retaining screw.
6. Install the freezer plate screws to the cooling unit
(eight screws with washers). Do not overtighten the
freezer plate screws.
7. Install the fin assembly retaining screws to the
cooling unit (four screws). Do not overtighten fin
screws.
8. Attach the thermistor to the 2nd fin (counting from
right to left).
9. Seal the drain tube opening with sealant.
10. Fasten the absorber brackets of the cooling unit to
the cabinet (two screws). Do not overtighten
retaining screws.
11. Tape all four edges of the foam plug to the cabinet
using HVAC metallic tape or heavy duty duct tape.
www.norcold.com/cda
37
12. Install upper and lower cable ties to wire harness.
Condenser
retaining
screws
a. Reinstall the ice maker water valve.
b. Reconnect the ice maker water line and
dispenser water line
c. Connect the brown and the white wires to the
water valve solenoid terminals.
13. Install the burner box, then install the burner box
retaining screw.
14. Install the burner tube and burner assembly. Do not
overtighten fittings.
15. Install the gas valve and connect the burner tube to
the valve. Do not overtighten fittings.
16. Install the spark/sense electrode assembly, then
install the electrode assembly retaining screw. Set
electrode-to-burner air gap 1/8 to 3/16 inch.
17. Install the burner box cover, then install the burner
box cover retaining screw.
18. Connect the AC heater wires to power board
terminals AC_HT -LO1 and AC _HT _HI.
19. Reinstall the power board cover.
20. Connect the gas valve wires to the power board
terminals GV and GV_GND.
21. Connect the flapper heater wires.
22. Plug the AC cord into the power board.
23. Connect the spark/sense electrode assembly to
the power board.
Figure 35. Condenser angle and retaining screw
Low temp
evaporator
1/2 in. bead
of sealant
Foam plug step
1/2 in. bead
of sealant
High temp
evaporator
1/2 in. bead of
sealant
Figure 36. Application of sealant
38
www.norcold.com/cda
Reinstallation of Refrigerator into Enclosure
!
Cabinet retaining
screw holes
WARNING
Do not install the refrigerator if the combustion seal
has been damaged. A damaged combustion seal must
be replaced. The seal isolates the living area of the
vehicle from exhaust gases generated by LP gas
combustion. LP gas exhaust gases contain carbon
monoxide, which is an odorless, colorless gas that
can cause dizziness, nausea, or in extreme
concentrations, death.
Bottom
trim
Trim screws
1. Check the condition of the combustion seal.
Replace seal if damaged. Do not install the
refrigerator if the combustion seal is damaged.
2. Place the refrigerator in the enclosure. The
combustion seal must seat fully against the
enclosure wall.
3. Install all cabinet retaining screws. See Figures 37
and 38.
4. Reinstall trim pieces. See Figures 37 and 38.
5. Secure the back of the cabinet to the enclosure
floor with the mounting flange screws.
6. Install drip cup, then install drip cup retaining
screw.
Screw plugs
Figure 37. Bottom trim and cabinet retaining screws
Trim screw
Top trim
Trim
screw
plug
Side
trim
Cabinet retaining
screw hole
a. Connect the water supply line to the ice maker/
dispenser water valve.
b. Open the water supply to the ice maker/
dispenser.
Side trim
Figure 38. Top trim and cabinet retaining screws
c. Check for water leaks.
7. Connect the RV LP gas supply line to the gas
valve inlet fitting.
8. Open the solenoid gas valve manual shut-off.
9. Plug the refrigerator AC power cord into the RV
receptacle.
10. Connect the RV DC power supply wires to power
board terminals 12VDC and 12V_GND1.
11. Open the LP gas tank valve(s), then leak test LP
gas connection at solenoid gas valve.
12. Leak test the burner solenoid gas valve and orifice
assembly burner tube connections.
www.norcold.com/cda
39
ELECTRONIC COMPONENTS
Description
Inputs, outputs, monitoring, and diagnostic functions
are managed and controlled by the power board.
Inputs, outputs, monitoring information, and diagnostic
functions are communicated through the optical control
assembly. The wire harness interfacing the power
board with the optical control assembly is "foamed"
into the cabinet. Wiring pictorials and schematics can
be found on pages 52-55.
NOTE
Because the wire harness is "foamed" into the cabinet,
it is not a replaceable component. This wire harness
is not connected to the ice maker wire harness
described on page 56.
AC power
terminals
AC heater
terminals
F3 fuse
Wire harness
AC power connector (P1)
Power Board
Two self-tapping 1/4 inch hex head screws hold the
power board and base in place. The power board cover
is held by three self-tapping 1/4 inch hex head screws.
Removal–Power Board
2. Turn OFF the RV DC power to the refrigerator.
3. Disconnect DC power supply wires from power
board terminals 12 VDC and 12_VGND1.
4. Unplug the AC power cord from the RV AC
receptacle.
5. Disconnect the AC cord from the power board.
6. Disconnect the flapper heater wires from the power
board.
7. Disconnect the gas valve wires from power board
terminals GV and GV_GND.
8. Disconnect the spark sense electrode wire.
Ice maker and/or water dispenser units
Loosen the water valve bracket, then move the
bracket/water valve assembly out of the way.
9. Remove the three 1/4 inch self-tapping hex head
screws from the power board cover, then remove
the power board cover.
10. Disconnect the both AC heaters' wires from the
power board terminals AC_HI, AC_LO, AC_HI_2,
and AC_LO_2.
11. Disconnect the wire harness connector from power
board, terminal P1.
12. Remove the two 1/4” hex head screws attaching
the board to the base, then remove the power
board along with its base.
40
DC power
terminals
Figure 39. 1200 power board
The power board is located on the back of the
refrigerator below the absorber coils. It is seated on an
insulated base to prevent the printed circuit from
making contact with the refrigerator's cabinet metal
plate. The power board seated in its base is shown in
Figure 39.
•
Spark/sense
electrode
termnial
5 amp fuse
Gas valve
DC power (F1) terminals
Flapper heater
terminals
Installation–Power Board
1. Seat the power board in the base.
2. Attach the power board and base assembly to the
refrigerator using two, 1/4 in. self-tapping hex head
screws. Do not overtighten screws.
3. Connect the wire harness connector to the power
board, terminal P1.
4. Connect the AC heaters' wires to terminals AC_HI,
AC_HI_2, AC_LO and AC_LO_2.
NOTE
When connectiong the AC heaters' wires, be sure to
connect both yellow wires and then both black wires
to the correct terminals.
5. Install the power board cover with three screws.Do
not overtighten screws.
6. Connect the solenoid gas valve wires to terminals
GV and GV_GND.
7. Connect the spark/sense electrode wire to the
power board high tension terminal.
8. Connect the AC power cord to the power board.
9. Connect the flapper heater wires to the power
board.
10. Plug AC power cord into the RV ac receptacle.
11. Connect DC power to the power board.
Positive wire (+) to terminal 12VDC.
Negative wire (–) to terminal 12_VGND1.
Ice maker and/or water dipenser units
•
Reinstall the water valve and bracket assembly.
12. Turn ON the RV DC power to the refrigerator.
13. Turn ON refrigerator, then check all power board
control functions before placing in service.
www.norcold.com/cda
CONTROLS
Two 7-Segmet LED Display
Shows operation mode AUTO, AC, and LP.
Shows fault codes and diagnostic information.
TEMP SET Switch
Press momentarily to view temperature setting.
Press and hold to select a temperature setting.
Settings: 1= cold/9= coldest.
Coldest
Cold
TEMP
SET
ON
OFF
AUTO
MODE
AC
LP GAS
MODE Switch
Press momentarily to display operating mode.
Press and hold to select AUTO, AC or LP Manual
Mode.
Release when desired mode displays.
Power Switch
Press momentarily to turn ON refrigerator.
Press and release after three seconds to
turn OFF refrigerator.
Figure 40. Optical control assembly, serial numbers 832170 and lower
TEMP SET Switch
Press momentarily to view temperature setting.
Press and hold to select a temperature setting.
Settings: 1= cold/9= coldest.
Power Switch
Press momentarily to turn ON refrigerator.
Press and release after three seconds to
turn OFF refrigerator.
on
1 COLD - 9 COLDEST
SET
TEMP
MODE
ON / OFF
Two 7-Segmet LED Display
MODE Switch
Shows operation mode AUTO, AC, and LP.
Press momentarily to display operating mode.
Shows fault codes and diagnostic information. Press and hold to select AUTO, AC or LP Manual
Shows temperature setting.
Mode.
Release when desired mode displays.
Figure 41. Optical control assembly, serial numbers 832171 and higher
Optical Control Assembly
The optical control assembly, located on the front of
the refrigerator, communicates with the power board
through a "foamed in" wire harness (this wire harness
is not connected to the ice maker wire harness).
Drilling or puncturing the refrigerator rear panels may
cause damage to the wire harness. Controls and
related features are shown in Figures 40 and 41. Units
with serial numbers 832170 and lower have controls
shown in Figure 40, and units with serial numbers
832170 and higher have the controls shown in Figure
41. Two screws hold the optical control assembly into
place.
Replacing Optical Control Assembly
1. Turn the refrigerator OFF.
2. Remove the two control retaining screws, then
remove the optical control assembly.
3. Disconnect the optical control assembly from the
wire harness.
4. Connect the replacement optical control assembly
to the wire harness.
5. Install the optical control assembly on the divider,
then install the control retaining screws. Do not
overtighten the retaining screws.
6. Turn on the refrigerator, then check all of the
optical control assembly functions.
www.norcold.com/cda
41
Modes of Operation, S/N 832170 and Lower
AUTO
In AUTO mode, AC power is the first heat energy
source selected by the controls. If AC power is not
present, the controls shift to LP gas (propane), the
second priority heat energy source.
Shift from AUTO LP GAS to AUTO AC
In AUTO mode, the controls shift automatically from
AUTO LP GAS to AUTO AC any time the controls
sense that AC power is available.
No AC Power and No Flame
When AC power is not present and a flame is not
sensed, at the end of the 30 seconds trial-for-ignition,
the controls:
AUTO AC Operation
When the AUTO mode is selected, the controls:
1. Light AC and AUTO lights while the
controls search for AC power.
AUTO
AC
LP GAS
1. Shut off power to the solenoid gas valve.
2. Set "gas lock-out." See NOTE 2.
2. Turn off AC light when AC power is
detected. The AU light remains lit.
See NOTE 1.
AUTO
AC
LP GAS
3. Sound the alarm (an intermittent beeping tone).
NOTE 1
In AUTO mode, pressing the MODE pushbutton
momentarily displays the heat energy source in use.
4. Provide a visual warning by flashing the AC and LP
lights alternatively while flashing "no" on the
display as shown below.
AC
AUTO LP Operation
The controls shift to AUTO LP mode any time AC
power is not available. The controls shift to AUTO LP
as follows:
1. AC and AUTO lights are lit while the
controls search for AC power.
2. When AC power is not present, the
controls shift to AUTO LP mode. The
AUTO and LP lights are lit as the
controls start a 30 seconds trial-forignition.
3. Once the controls sense the flame, the
LP light is turn off and only the AUTO
light remains on. See NOTE 1.
AUTO
AC
5. Record and store the "no AC" and "no LP" faults in
diagnostics nonvolatile memory fault history.
LP GAS
NOTE 2
AUTO
AC
AUTO
AUTO LP mode remains in "gas lock-out" until a full
cooling cycle on AUTO AC is completed. "Gas lockout" can also be cleared by turning the refrigerator OFF
then back ON.
LP GAS
AC
LP GAS
Troubleshooting No Flame and No AC Faults
Use the following references to identify, troubleshoot,
and correct an ignition failure and/or "no AC" faults.

42
LP GAS
Page 10, "no FL/no LP" fault codes
troubleshooting flowchart.
Page 13, "no AC" fault codes troubleshooting
flowchart.
Page 47, Diagnostic Mode, Screen 3 or page 50,
Diagnostic Mode, Screen 4.
www.norcold.com/cda
AC Manual Mode
LP Manual Mode
In the AC Manual mode, AC power is the only heat
energy source selected by the controls. When AC
Manual Mode is selected:
In the LP Manual Mode, LP gas is the only heat
energy source selected by the controls. When the
controls shift to LP Manual mode:
1. The AC light flashes as the controls
start the search for AC power.
AUTO
AC
LP GAS
1. The LP light flashes and the controls
start a 30 second trial-for-ignition.
2. When AC power is detected, the AC light
remains on.
AUTO
AC
AUTO
AC
LP GAS
AUTO
AC
LP GAS
LP GAS
2. When the controls sense a flame
the LP light remains on.
No AC Power or Loss of AC Power
If the controls do not sense the presence of AC power
or when AC power is lost in AC Manual mode, the
controls:
1. Display the "no AC" fault code.
Flame Fails to Ignite or Flame Goes Out
If the controls do not sense a flame within the 30
second trial-for-ignition or the flame goes out, the
controls:
AC
2. Set "gas lock-out." See NOTE 3 below.
2. Sound the audible alarm. The alarm is an
intermittent beeping tone. Pressing the MODE
pushbutton silences the alarm.
3. Record and store the "no AC" fault in diagnostics
nonvolatile memory fault history.
3. Sound an audible alarm. The alarm is an
4. Display a flashing visual warning, "no LP" (shown
below).
AC Power Restored
When AC power is restored, the controls:
LP GAS
1. Automatically restore AC Manual Mode operation;
however, the recorded fault history will not be
erased from memory.
2. Silence the alarm and clear then "no AC" fault
code from the display.
NOTE 3
then back ON or by selecting the AUTO mode.
Troubleshooting "no AC" Fault
and correct a no AC fault.

flowchart.
Page 47, Diagnostic Mode, Screen 6 or pages 5051, Diagnostic Mode, Screens 5 and 8.
www.norcold.com/cda
43
Modes of Operation, S/N 832171 and Higher
AUTO
In AUTO mode, AC power is the first heat energy
source selected by the controls. If AC power is not
present, the controls shift to LP gas (propane), the
second priority heat energy source.
AUTO AC Operation
When the AUTO mode is selected, the controls:
Shift from AUTO LP GAS to AUTO AC
In AUTO mode, the controls shift automatically from
AUTO LP GAS to AUTO AC any time the controls
sense that ac power is available.
No AC Power and No Flame
When AC power is not present and a flame is not
sensed, at the end of the 30 seconds trial-for-ignition,
the controls:
1. Display AUTO ("AU") mode operation
indicator.
2. Set "gas lock-out." See NOTE 5.
Alternating
2. Flash "AU" and "AC" as the
search for AC power begins.
o
n
3. Sound the alarm (an intermittent beeping tone).
Display
4. Provide a visual warning by flashing alternating "no
AC" and "no FL" (no flame) fault codes shown
below).
3. Turn off "AU" and "AC" when ac power is
detected and display the "ON" LED. See
NOTE 4.
Alternating
Alternating
Display
Display
NOTE 4
In AUTO mode, pressing the MODE pushbutton
momentarily displays the heat energy source in use.
For example, in AUTO AC, the display flashes AU
and AC alternatively for approximately 10 seconds.
5. Record and store the "no AC" and "no FL" faults in
diagnostics nonvolatile memory fault history.
NOTE 5
AUTO LP Operation
The controls shift to AUTO LP mode any time ac
power is not available. The controls shift to AUTO LP
as follows:
then back ON.
1. The AUTO mode operation indicator
("AU") displays.
2. "AU" and "AC" indicator
alternate flashing on the display
while the controls search for AC
power.
3. When AC power is not present, the
controls shift to AUTO LP mode. "AU"
and "LP" flash alternatively on the
display as the controls start a 30
seconds trial-for-ignition.
Alternating
o
n
Display
Alternating
o
n
Display
Troubleshooting No Flame and No AC Faults
and correct an ignition failure and/or "no AC" faults.

Page 10, "no FL/no LP" fault code troubleshooting
flowchart.
Page 13, "no AC" fault code troubleshooting
flowchart.
Page 47, Diagnostic Mode, Screen 3 or page 50,
4. Once the controls sense the flame, they
turn off the "AU" and "LP", and display
the ON LED. See NOTE 4.
44
www.norcold.com/cda
AC Manual Mode
LP Manual Mode
In the AC Manual mode, AC power is the only heat
energy source selected by the controls. When AC
Manual Mode is selected:
In the LP Manual Mode, LP gas is the only heat
energy source selected by the controls. When the
controls shift to LP Manual mode:
1. The AC mode indicator ("AC") displays
as the controls start the search for AC
power.
1. The LP mode indicator ("LP") displays
and the controls start a 30 second trialfor-ignition.
2. When AC power is detected, the AC
indicator turns off. The "ON" LED displays.
See NOTE 6.
2. The LP mode indicator turns off when the
controls sense a flame. The "ON" LED
displays. See NOTE 7.
NOTE 6
Pressing the MODE pushbutton displays the "AC"
mode indicator.
No AC Power or Loss of AC Power
If the controls do not sense the presence of AC power
or when AC power is lost in AC Manual mode, the
controls:
1. Display the "no AC" fault code.
NOTE 7
Pressing the MODE pushbutton displays the "LP"
mode indicator.
Flame Fails to Ignite or Flame Goes Out
If the controls do not sense a flame within the 30
second trial-for-ignition or the flame goes out, the
controls:
Alternating
2. Set "gas lock-out." See NOTE 8 below.
Display
2. Sound the audible alarm. The alarm is an
3. Display a flashing visual warning, "no FL" (shown
below).
3. Record and store the "no AC" fault in diagnostics
nonvolatile memory fault history.
4. Sound an audible alarm. The alarm is an
Alternating
AC Power Restored
When AC power is restored, the controls:
Display
1. Automatically restore AC Manual Mode operation;
however, the recorded fault history will not be
erased from memory.
2. Silence the alarm and clear then "no AC" fault
code from the display.
NOTE 8
then back ON.
Troubleshooting "no AC" Fault
and correct a "no AC" fault.

flowchart.
Page 47, Diagnostic Mode, Screen 3, page 50,
www.norcold.com/cda
45
DIAGNOSTIC MODE - S/N 832170 AND BELOW
LED lights
Coldest
Cold
ON
OFF
TEMP
SET
MODE
AUTO
AC
LP GAS
LED screen
numbers
LED lights
Figure 42. Optical control assembly, units with serial numbers 832170 and lower
Diagnostic Mode
The Diagnostic Mode uses ten diagnostic channels,
commonly known as "screens," to display "live"
inputs, outputs, and fault history. Each screen is
numbered. The "screens" for units with serial numbers
832170 and lower incorporates both the LED screen
numbers and the LED lights. See Figure 42.
Accessing the Diagnostic Mode
To access the Diagnostic Mode:
1. Press and hold both the
and
TEMP
SET
buttons
at the same time.
2. Release the
This optical control display uses a dual 7-segment
LED module and lights to display the screen number
and/or diagnostic information. Fault history, "live"
inputs, and outputs are presented using LED
segments and control lights.
MODE
MODE
and
TEMP
SET
buttons as soon as
displays.
Changing Screens
To change screens, press and hold the
MODE
button
until the next screen displays.
Exiting the Diagnostic Mode
To exit the Diagnostic Mode:
1. Press and hold
MODE
and
TEMP
SET
buttons at the
same time.
2. Release the
MODE
and
TEMP
SET
buttons when the
controls leave the diagnostic mode.
Turning the refrigerator OFF then back ON also exits
the Diagnostic Mode.
46
www.norcold.com/cda
Screens and Diagnostic LEDS Information, Units with S/N 832170 and Lower
Screen 1, LED Segments Reliability Check
Screen 4, Inputs and Outputs
Screen 1 confirms that the LED screen and LED lights
are operational. All LED segments and LED lights should
light. See illustration.
Screen 4 displays the real time activity of the refrigerator.
Coldest
Cold
TEMP
SET
ON
OFF
MODE
AUTO
AC
Screen number
Power to light
Doors closed and light off
AC power to AC heaters
Voltage to selected operating mode*
Power to flapper heater
AUTO
MODE
AC
LP GAS
* Selected operating mode
displayed on the mode lights
Press the
MODE
TEMP
SET
ON
OFF
If the screen segments or lights do not match the ones
shown in the illustration, the fault is in the optical control
assembly. Replacing the optical control should resolve
the fault. See page 41.
Press the
Coldest
Cold
LP GAS
MODE
button to bring up screen 5.
Screen 5, Stored Fault History
Screen 2, LED Segments Reliability Check
Screen 2 diagnostics continue to confirm the reliability of
the display. The numerical LED segments and the LED
lights turn off. See illustration.
Screen 5 displays stored fault history using LED lights.
If a fault occurred, its assigned fault history LED will
be on.
Screen number
AC relay stuck open**
AC voltage high**
AC voltage low**
Incorrect AC voltage to heaters**
Problem with AC heater(s)**
Coldest
Cold
Coldest
Cold
ON
OFF
TEMP
SET
AUTO
MODE
AC
AC
LP GAS
Ignition failure occured**
Flame sense failure occured**
Thermistor failure**
**Lighted LEDs on this screen indicate a previous failure.
Press the
MODE
MODE
AUTO
If any of the LED screen segments or LED lights display,
the fault is in the optical control assembly. Replacing the
optical control should resolve the fault. See page 41.
Press the
TEMP
SET
ON
OFF
LP GAS
MODE
Screen 6, Stored Fault History
Screen 3, Inputs and Outputs
Screen 3 displays the real time activity of the refrigerator.
Screen 6 displays stored fault history using LED lights. If
a fault occurred, its assigned fault history LED will
be on.
Screen number
DC voltage high**
DC voltage low**
Inner control failure**
AC power not available**
Door ajar for 2+ minutes**
Screen number
Power to gas valve
Divider heater operational
AC present
Flame present
ON
OFF
TEMP
SET
AUTO
ON
OFF
MODE
AC
Coldest
Cold
Coldest
Cold
TEMP
SET
AUTO
LP GAS
MODE
AC
LP GAS
**Lighted LEDs on this screen indicate a previous failure.
Press the
MODE
Press the
MODE
www.norcold.com/cda
47
Screen 7, Fin Temperature
Screen 9, AC Heater Current
Screen 7 displays the actual fin temperature being
sensed by the thermistor. This is not the fresh food
cabinet air temperature. The illustration shows 32°F
fin temperature as displayed in screen 7. More thermistor
information can be found on page 29.
Screen 9 the AC heater current measured by the
controls.
AC heater (2) amp draw
Coldest
Cold
Cooling fin temperature
ON
OFF
Coldest
Cold
TEMP
SET
AUTO
TEMP
SET
ON
OFF
MODE
AUTO
Press the
MODE
AC
MODE
AC
LP GAS
Indicates AC current measurment
Shown: 4.8 amps
LP GAS
Press the
MODE
Screen 8, AC Input Voltage
Screen 0, DC Input Voltage
Screen 8 displays AC input voltage measured by the
controls.
Screen 0 displays the DC voltage measured by the
controls.
AC voltage over 100 Vac
Vac greater than or equal to 100
Coldest
Cold
ON
OFF
DC voltage over 10 volts*
Vdc greater than or equal to 10
TEMP
SET
AUTO
ON
OFF
MODE
AC
LP GAS
48
MODE
TEMP
SET
AUTO
Indicates AC voltage measurment
Shown: 100+20=120 Vac
Press the
Coldest
Cold
MODE
AC
LP GAS
*Shown: 10 + 2.0 = 12.0 Vdc
Press the
www.norcold.com/cda
MODE
button to return to screen 1.
DIAGNOSTIC MODE - UNITS S/N 832171 AND ABOVE
on
1 COLD - 9 COLDEST
SET
TEMP
MODE
ON / OFF
Figure 43. Optical control assembly, units with serial numbers 832171 and higher
Diagnostic Mode
The Diagnostic Mode uses ten diagnostic channels,
commonly known as "screens," to display "live"
inputs, outputs, and fault history. Each screen is
numbered. The screen number is always displayed on
the left side of the optical control assembly display.
See Figures 43 and 44.
Accessing the Diagnostic Mode
To access the Diagnostic Mode:
1. Press and hold both the
and
MODE
TEMP
SET
buttons at
the same time.
This optical control display uses a dual 7-segment
LED module to display the screen number and
diagnostic information. Information displayed is made
up of four letters or digits that flash in an alternating
sequence. Fault history, "live" inputs, and outputs are
presented using LED segments. The diagnostic LED
segments, if present, display to the right of the screen
number. For diagnostic LED segments identification
numbers, see Figure 44.
2. Release the
and
MODE
screen
TEMP
SET
buttons as soon as
displays.
3. A few seconds later,
displays.
Changing Screens
To change screens, press and hold the
until the next screen displays.
button
MODE
Screen Number
1
2
Exiting the Diagnostic Mode
To exit the Diagnostic Mode:
3
4
5
1. Press and hold
6
7
and
MODE
ON Light
Figure 44. Diagnostic LEDs segments identification.
TEMP
SET
buttons at the
same time.
2. Release the
and
MODE
display shows
TEMP
SET
buttons as soon as the
.
Turning the refrigerator OFF then back ON also exits
the Diagnostic Mode.
www.norcold.com/cda
49
Screens and Diagnostic Segments Information
Screen
Screen
Diagnostic Mode Active
Screen 1 confirms that the Diagnostic Mode is active. A
few seconds after the screen number appears, all LED
segments light. See illustration.
Stored Fault History
Screen 4 displays stored fault history using lighted LED
segments. The illustration provides fault history
information with assigned LED segments . If a fault
occurred, its assigned fault history LED will be on.
Door ajar
Ignition fault
1
If the screen segments do not match the ones shown in
the illustration, the fault is in the optical control
Press the
Screen
Number
DC voltage high
AC relay stuck closed
4
6
5
7
AC heater failed open
AC mode selected
but not available
Press the
MODE
DC voltage low
3
2
MODE
Screen
LED Segments Reliability Check
Screen 2 diagnostics continue to confirm the reliability of
the display. After a few seconds only the ON light
displays. All other LED segments should be off. See
illustration.
Screen
Stored Fault History
Screen 5 also displays stored fault history using lighted
LED segments. The illustration provides fault history
information with assigned LED segments . If a fault
occurred, its assigned fault history LED will be on.
Flame sense failure
Thermistor failure.
1
ON Light
2
Screen
Number
5
The ON light should be the only LED displayed. If any
other LED displays, the fault is in the optical control
6
AC voltage high
AC voltage low
Press the
MODE
Press the
Screen
MODE
Screen
Thermistor Fin Temperature
Screen 3 displays the actual fin temperature being
sensed by the thermistor. This is not the fresh food
cabinet air temperature. The illustration shows 32°F
fin temperature as displayed in screen 3.
Erase Fault History
Screen 6 provides a way to erase fault history from
memory. To erase fault history:
1. Press and hold the
TEMP
SET
button when
on the screen.
2. Release the button when
= 32°F
shows on the
screen.
3. Wait five seconds.
4. Press and hold the
Press the
TEMP
SET
button until
on the screen.
MODE
Press the
MODE
50
shows
www.norcold.com/cda
shows
Screen
Power Board Inputs
Screen
Screen 7 displays "live" power board inputs using lighted
LED segments. The illustration below provides "live"
inputs information and assigned LED segments. If a
power board input is active or "live," its assigned
input LED will be on.
Power Board DC Voltage Status
Screen 9 displays DC voltage status using lighted LED
segments. The illustration below provides DC voltage
status information and assigned LED segments. If DC
voltage at the power board is within normal range
(10.5 to 15.4 Vdc), LED segment 4 will be on.
Food comparment light
is off and door is closed
Sensing burner flame
1
2
3
Screen
Number
Thermistor sensing
fin temperature
DC voltage higher than 15.4 volts
1
Screen
Number
DC voltage normal
4
7
DC voltage lower than 10.5 volts
Press the
Press the
MODE
Screen
MODE
Power Board Outputs
Screen
Screen 8 displays "live" power board outputs using
lighted LED segments. The illustration below provides
"live" outputs information and assigned LED segments. If
a power board output is active or "live," its assigned
output LED will be on.
Power Board AC Voltage Status
Screen 0 displays AC voltage status using lighted LED
segments. The illustration below provides AC voltage
status information and assigned LED segments. If AC
voltage at the power board is within normal range
(108 to 132 Vac), LED segment 4 will be on.
AC voltage higher than 132 volts
AC power to AC heater
1
1
3
Screen
Number
4
5
6
DC power to divider heater
DC power to gas valve
DC power to ignition circuit
Screen
Number
4
AC voltage normal
7
AC voltage lower than 108 volts
DC power to light switch
Press the
MODE
Press the
button to return to screen 1.
MODE
www.norcold.com/cda
51
WIRING PICTORIALS AND DIAGRAMS - SN 832170 AND BELOW
Figure 47. 1200XX/120X-IMXX wiring pictorial - SN 832170 and below
52
www.norcold.com/cda
Figure 48. 1200XX/120X-IMXX wiring diagram - SN 832170 and below
www.norcold.com/cda
53
WIRING PICTORIALS AND DIAGRAMS - SN 832171 AND ABOVE
1
Display overlay
10
Movable door seal heater
19
Dispenser board*
2
Display board
11
Fans
20
Dispenser microswitch*
3
Divider heater
12
Temperature switch
21
Dispenser valve*
4
Thermistor/light assembly
13
Gas valve***
22
Water valve heater*
5
Ignitor***
14
Door switches
23
Dispenser water line heater*
6
Power board
15
AC heaters
24
Ice maker water line heater**
7
12 Vac power cord
16
Door contacts
25
Temperature switch*
8
5 amp fuse (120 Vac)
17
Ice maker water line heater** 26
9
5 amp fuse (12 Vdc)
18
Temperature switch**
Dispenser light*
* Water dispenser models only
** Ice maker models only
*** Gas models only
Figure 49. 1200XX/120X-IMXX pictorial - SN 832171 and above
54
www.norcold.com/cda
1
Power board
11
Temperature switch*
21
Dispenser light*
2
Gas valve***
12
Display board
22
Dispenser valve*
3
Temperature switch
13
120 Vac connection
23
Water valve heater*
4
Interior light
14
AC heaters
24
Dispenser water line heater*
5
Divider heater
15
Door switches
25
Dispenser microswitch*
6
ON/OFF switch
16
Temperature switch**
26
Ice maker water line heater**
7
Voltage regulator
17
Flapper heater
27
Ignitor***
8
MODE button
18
Fans
28
Temperature switch
9
TEMP SET button
19
Water line heater**
Overlay
20
Door contacts
10
* Water dispenser models only
** Ice maker models only
*** Gas models only
Figure 50. 1200XX/120X-IMXX wiring diagram - SN 832171 and above
www.norcold.com/cda
55
ICE MAKER COMPONENTS AND SERVICE
The ice maker is a factory installed accessory located
on the right side of the freezer compartment. The
components that support the ice maker are the wire
harness, water fill tube, water fill line, and water valve.
An ice maker cannot be added to a refrigerator that
was manufactured without an ice maker.
Green
Brown
White
Thermal fuse
Black
Ice maker connector
Specifications
Cycle ....................... One revolution (eject and water fill)
Water fill capacity ............................ 4.7 fl. oz. (140 mL)
Ice yield ............................ 3.5 lbs/24 hrs. (approximate)
Cycle duration ...................................... 3.5 to 7 minutes
Electrical rating ....................... 185 W - 115 Vac - 60 Hz
Amp draw
Cycle on/heater on ............................................... 1.6 A
Cycle on/heater off ............................................... 0.3 A
Cycle off .................................................. No amp draw
Motor ....................................................... 1.5 W/8800 Ω
Mold heater ................................................. 185 W/72 Ω
Wire Harness
The ice maker wire harness, see Figure 51, connects
the ice maker to the 120 Vac ice maker power cord.
The assembly is bundled together with plastic ties.
The wire harness runs through the surface of the
cooling unit foam plug. On the upper ice maker end the
harness has a modular plug with a locking tab (see
Figure 51). Each wire on the harness has the
appropriate connector to connect to the ice maker AC
power cord (white AC cord). The four wires making up
the wire harness are:
Black:
connects to smooth ac wire
Black - Line voltage (L) - black wire with female
quick-connect terminal. This conductor is
equipped with a thermal fuse. The thermal fuse is
held onto the ice mold by a spring clip.
White - Neutral (N) - white wire with male quick-
Green:
connects
to metal plate
connect terminal. It connects to the AC power
cord neutral wire.
Brown:
connects to water valve
Brown - Water valve line voltage - brown wire
with female quick-connect terminal. It connects to
the water valve solenoid, terminal M.
Green - Ground wire - green wire with lug
White:
connects to ribbed ac wire
Figure 51. Ice maker wire harness
terminal. It connects to the refrigerator cabinet
metal plate.
The refrigerator has to be removed from the enclosure
to replace the ice maker wire harness.
NOTE
The ice maker wire harness is not the same as nor
connected to the wire harness that serves the power
board and the optical display assembly, as described
on pages 40 and 41.
56
www.norcold.com/cda
Water Fill Tube
Fill tube
The water fill tube connects the water fill line
to the ice maker. It penetrates into the freezer
cabinet from the rear of the refrigerator. This
tube is factory installed and sealed and should
not be disturbed or removed; it cannot be
replaced. See Figure 52 for the location of the
water fill tube.
The water fill line connects the water fill tube to
the water valve at the bottom of the refrigerator.
It is constructed of 1/4 inch plastic tubing. It
connects to the water valve and water fill tube
with 1/4 inch compression style fittings. See
Figure 52. The water line is encased in a 12 Vdc
foil style strip heater. To replace the water fill line
the refrigerator must be removed from the
enclosure.
To ice maker
Water fill line
Water Fill Line
Water line heater
12 Vdc Water Line Heater
The water line heater encases the entire length of
the water fill line. This heater operates on 12 Vdc.
Water valve
Heater operation is automatically controlled by
a small thermostat. See Figure 52. The
thermostat is “clipped” to the water valve
bracket. It turns on the heater when the
surrounding temperature is 38° F, ±4° (34°
to 42° F). It turns off the heater when the
temperature rises to 48°F.
From AC power cord
Brown from wire harness
Thermostat
To refrigerator wire harness
Retaining clips (2)
Water line heater
connection
To refrigerator wire harness
Figure 52. Water fill tube, line, and heater
www.norcold.com/cda
57
Water Valve (Without Water Dispenser)
The ice maker water valve, see Figure 53, is solenoid
operated. This valve is located on the back of the
cabinet on the bottom of the refrigerator The solenoid
is supplied 120 Vac through the ice maker wire
harness. Spring pressure maintains the valve shut
when the solenoid is not energized.
Water Valve Replacement Procedure
1. Turn the refrigerator OFF.
2. Unplug both the ice maker AC power cord and the
refrigerator AC power cord from the RV receptacle.
3. Shut off the water supply to the ice maker.
4. Disconnect the wires from the water valve solenoid
terminals.
5. Disconnect the white heater wire from the
thermostat wire (white-from-brown).
6. Disconnect remaining white heater wire from wire
harness lead (white-from-red).
7. Disconnect the brown thermostat wire from wire
harness (brown-from-red).
8. Disconnect the water supply line from valve’s inlet
fitting.
9. Disconnect the ice maker water line.
10. Remove the thermostat clips (2) and thermostat.
Retain thermostat and clips.
11. Unwrap the heater wire from water valve.
12. Remove the water valve retaining screws, then
remove the water valve/bracket assembly. Retain
screws and spacers.
To install replacement solenoid water valve:
1. Install the replacement water valve/bracket
assembly on the refrigerator. Use screws and
spacers previously removed.
2. Clip the thermostat to water valve bracket. Use
clips previously removed.
3. Carefully wrap one white heater wire around the
valve as shown in Figure 53. Do not exceed two
wraps at each point.
4. Tape wire wraps to keep the wire turns in position
and to keep wire turns from overlapping. Do not
allow wires to overlap.
5. Connect the wrapped white heater wire to a
thermostat wire (brown).
6. Connect the remaining white heater wire to the
black wire connected to the refrigerator wire
harness
7. Connect the remaining thermostat brown wire to
the red wire connected to the refrigerator wire
harness.
8. Connect ice maker water line, then tighten fitting
firmly. Do not overtighten.
9. Connect RV water supply to water valve, then
tighten fitting firmly. Do not overtighten.
10. Connect solenoid wires. Brown wire to terminal M
and wire from 120 Vac power cord to terminal B4.
11. Open water supply to ice maker.
12. Plug in both ice maker AC power cord and the
refrigerator AC power cord.
From AC power cord
Wire harness
(brown)
2-wraps maximum
Thermostat
White
Brown
White
Red
Black
Br o wn
To ice maker
Red
Figure 53. Solenoid water valve (models without water dispenser)
58
www.norcold.com/cda
Ice Maker Troubleshooting Chart
Problem
No ice in
mold/no ice
yield.
Not cycling,
ice in mold.
Probable Causes
A. No AC power to ice maker.
A. Check AC power supply.
B. No water available to water valve.
B. Check water supply to valve.
C. Clogged water valve strainer.
C. Clean water valve strainer.
D. Water valve solenoid faulty.
D. Test water valve. See page 61.
A. No AC power to ice maker.
A. Check AC power supply.
B. Ice maker OFF.
B. Lower shutoff arm to ON position.
C. Mold overfilled.
C. Check position of water valve orifice.
Reposition components.
D. Water valve washer seal
damaged.
Water
dripping from
mold/mold
overflowing.
Not cycling,
AC power
available.
Remedy
D. Replace water valve.
A. Water fill adjustment screw set
incorrectly.
A. Readjust water adjustment screw. See
page 62.
B. Water valve washer seal
damaged.
B. Replace water valve. See page 58.
A. Mold heater failed open.
A. Check motor continuity. See page 63.
B. Motor faulty.
B. Check motor continuity. See page 63.
C. Mold thermostat faulty.
C. Replace ice maker. See page 60.
D. Wire harness thermal fuse open.
D. Check continuity of black wire harness
wire.
Water Valve Service (Models without Water
Dispenser)
The water valve inlet strainer should be checked
annually for scale and sediment deposits. The inlet
connection internal components should only be
checked when the mold overfills. To access the
strainer and the components housed in the inlet fitting
(see Figure 54):
1. Shut off the water supply to the ice maker.
2. Disconnect the inlet fitting adapter from the water
valve inlet.
3. Check strainer position. If the strainer is seated
approximately 1/8 inch in the fitting, the orifice
seat, orifice, diffuser plate and strainer are in their
correct position. A creased strainer end usually
indicates that the diffuser plate, orifice, and orifice
seat are not in their correct position. These
components should be repositioned as shown in
Figure 54. To reposition components correctly:
a. Press the orifice seat fully against the valve
support, then seat the orifice firmly into the
orifice seat.
b. Seat the diffuser plate firmly against the orifice.
c. Seat the strainer firmly against the orifice
plate.
d. Reconnect the inlet fitting adapter to the water
valve.
Washer seal
Orifice Seat
Orifice
Diffuser Plate
Strainer
Figure 54. Solenoid water valve components
www.norcold.com/cda
59
Replacing Ice Maker
Cover
Removal of existing ice maker:
NOTE
Upper bracket
screws (2)
Be sure to save all screws and other components
removed from the existing ice maker in this
procedure, as these screws and components will be
used when installing the replacement ice maker.
1. Turn refrigerator OFF.
2. Unplug both the ice maker AC power cord (white) and
the refrigerator AC power cord (black).
3. Remove the ice bin, then remove the freezer shelf.
4. Unfasten two retaining screws to detach the ice
maker from mounting plate. See Figure 55. Save
screws.
5. Unfasten two freezer plate screws to detach mounting
plate from the freezer. Save screws and flat washers. Retaining screws (2)
6. Unfasten the upper bracket screws. Save screws.
7. Rotate ice maker until the front of the cover faces the
Freezer plate screws
door opening, then remove the cover.
(2 with flat washers)
8. Unclip the thermal fuse from the mold. See Figure 56.
Mounting plate
9. Unplug the wire harness connector. See Figure 56.
10. Remove shutoff arm. Save shutoff arm.
Figure 55. Ice maker screw locations
Installation of replacement ice maker:
1. Cut tab on ice maker and fold as shown in Figure 55.
2. Install the shutoff arm onto the replacement ice
maker.
3. Plug the wire harness connector into the ice maker.
Make sure connector locks into ice maker connector.
4. Clip the thermal fuse to the mold.
5. Install the cover, then rotate ice maker parallel with
the freezer plate, then align the upper bracket with
screw holes.
6. Install and fasten the upper bracket screws. Do not
overtighten screws.
7. Install the mounting plate.
8. Fasten the mounting plate to the ice maker with two
retaining screws. Do not overtighten retaining screws.
9. Install retaining screws to fasten the ice maker to the
mounting plate. Do not overtighten screws.
10. Install the freezer shelf, then install the ice bin.
11. Plug both the ice maker and the refrigerator AC power
cords into the RV receptacle.
Thermal fuse Spring clip
Connector Locking tab
To disconnect the wire harness from ice maker:
1. Unclip thermal fuse.
2. Push connector in.
2. Press in locking tab with small flat blade screwdriver.
3. While pressing locking tab, pull back on wire harness to
unplug the connector from ice maker.
Figure 56. Wire harness connection to ice maker
NOTE
Plug white AC power cord into AC outlet labeled “Ice
Maker.” Plug black AC power cord in outlet labeled
“Refrigerator.”
60
1. Cut down
left side.
2. Fold tab
back.
3. Cut down
right side.
www.norcold.com/cda
Cycle Testing Ice Maker
Cycle testing the ice maker verifies if the ice maker
completes all cycle functions. The cycle test is to be
done with the ice maker dry. To cycle the ice maker
operation manually:
TED
ULA
WG
14 A
1. Shut off the water supply to the ice maker water
valve.
2. Make sure 120 Vac is available to the ice maker.
3. Remove ice maker cover.
4. Make sure shutoff arm is in the down position (on).
!
INS
Figure 57. Jumper wire
CAUTION!
Remove jumper wire immediately after “click” sound
or no later than 15 seconds after jumping terminals T
and H. Failure to remove jumper wire may damage
the ice maker.
DISCONNECT POWER
TO REMOVE MODULE
185W–115V– 60 HZ
IM #S
135
628
106 626649
W2
TATE MA
RO
NU
A
L
LY
8
835
62
5. Jump terminals T and H. Use a 14 AWG jumper
wire with 1/2 inch insulation stripped from ends.
Jumper wire is shown in Figure 57. The jumping of
T and H is shown in Figure 58.
6. The ejector should begin to rotate clockwise
starting at the 2 o’clock stop position.
7. Remove jumper wire from terminals T and H when
a “click” sound is heard and no later than 15
seconds after jumping the terminals.
8. Observe ice maker operation as ejector rotates.
9. After the ice cubes break loose from the mold, the
ice maker should cycle without stopping. If the ice
maker stops, or makes loud noises, replace ice
maker. See section "Replacing Ice Maker," page
60.
DO N
OT
01/13/03
Figure 58. Cycle testing ice maker
Checking Water Valve Operation
To check water valve operation:
DISCONNECT POWER
TO REMOVE MODULE
185W–115V– 60 HZ
IM #S
135
628
106 626649
W2
TATE MA
RO
NU
A
L
8
835
62
DO N
OT
01/13/03
LY
V
14 AW
TED
SULA
G IN
1. Remove the ice maker cover.
2. Jump test point V and L. See Figure 59. Use a 14
AWG jumper wire with 1/2 inch insulation stripped
from each end (as shown in Figure 57). The
solenoid should click and buzz if it is operating
properly. If the solenoid does not click and buzz,
replace the water valve (see page 58).
L
Figure 59. Checking water valve operation
www.norcold.com/cda
61
Water Fill Adjustment
185W–115V– 60 HZ
IM #S
106 626649
W2
TATE MA
RO
NU
A
r*
ate
L
More w
* Do not exceed one turn
Water fill adjustment screw
Contact alignment opening
Figure 60. Water fill adjustment screw
CAUTION!
Do not turn the water fill adjustment screw over one
turn. Turning the screw over one turn may damage
the contacts. A 1/4 turn, clockwise or
counterclockwise, will vary the fill by 0.34fl.oz. (10
mL).
7. To readjust the water fill level turn the adjustment
screw clockwise or counterclockwise as required
until the contact hole is centered in the module
hole. See Figure 60.
DISCONNECT POWER
TO REMOVE MODULE
RU 185W–115V– 60 HZ
IM #S
RANGE
HOLD
REL
Hz
PEAK MIN MAX
H
628
135
MIN MAX
4 1/2 DIGITS
1 Seconds
W2
TATE MA
RO
NU
A
L
8
835
62
To check water valve solenoid resistance:
106 626649
LY
DO N
OT
01/13/03
Checking Water Valve Solenoid Resistance
1. Disconnect AC power to the ice maker.
2. Remove the ice maker cover.
3. Set multimeter to Ohm scale, then connect probes
to test points V and N. See Figure 61. The test
probe tips must be 1/2 inch long to make full
contact with internal terminals.
295 to 360Ω–water valve solenoid operating
properly.
mV
mA
A
V
µA
V
OFF
A
mA µA
V
COM
!
10A MAX
FUSED
400mA MAX
FUSED
CAT II
1000V MAX
!
Figure 61. Checking solenoid resistance
OL–check for loose wire harness connections at
water valve or an open solenoid coil.
00.0Ω–check resistance at solenoid terminals
and wire harness continuity.
62
Les
ater*
sw
628
135
01/13/03
8
835
62
!
DISCONNECT POWER
TO REMOVE MODULE
LY
1. Remove the two screws holding the ice maker to
the mounting plate. See Figure 55, page 60.
2. Remove the mounting plate from the freezer plate.
3. Remove two screws from the ice maker upper
mounting brackets.
4. Position the ice maker with the cover facing out.
Do not pull on wire harness.
5. Locate the screw and contact alignment opening
shown in Figure 60.
6. Determine the position of the hole in the internal
contact plate. Do not adjust the water fill
adjustment screw if the hole is centered within the
housing hole. See Figure 60.
Normal setting =Contact opening
centered within hole
DO N
OT
The water fill adjustment screw is set at the factory.
Often times, the production of thin ice cubes or the ice
maker not cycling correctly is related to an
unauthorized field adjustment to the water fill
adjustment screw. Proceed as follows to adjust the
water fill adjustment screw.
www.norcold.com/cda
Checking Mold Heater Resistance
To check the mold heater resistance:
DISCONNECT POWER
TO REMOVE MODULE
RU 185W–115V– 60 HZ
IM #S
106 626649
W2
TATE MA
RO
NU
A
L
8
835
62
DO N
OT
628
135
01/13/03
LY
1. Unplug the ice maker AC power cord.
3. Set multimeter to Ohm scale, then connect probes
to test points L and H. Test probe tips must be 1/2
inch long to make full contact with internal
terminals. See Figure 62.
71 to 79 Ω–mold heater is operating properly.
MIN MAX
RANGE
HOLD
REL
H
Hz
PEAK MIN MAX
4 1/2 DIGITS
1 Seconds
mV
mA
A
V
µA
V
OFF
Below 71 Ω or above 79 Ω–replace ice maker.
OL–open heater, replace ice maker.
mA µA
A
V
COM
!
400mA MAX
FUSED
10A MAX
FUSED
CAT II
1000V MAX
!
Checking Voltage to Motor
Figure 62. Checking mold heater resistance
To check voltage supply to motor:
1. Make sure 120 Vac is available to the ice maker.
3. Set multimeter to AC scale, then connect probes
to test point N and M. See Figure 63. Test probe
tips must be 1/2 inch long to make full contact with
internal terminals. Voltage at the motor should
measure 108 to 132 Vac.
Voltage higher than 132 Vac–check incoming ac
power source and correct overvoltage condition.
DISCONNECT POWER
TO REMOVE MODULE
RU 185W–115V– 60 HZ
IM #S
135
628
power source and correct under-voltage condition.
No voltage present–check wire connections and
continuity through thermal fuse.
V
MIN MAX
RANGE
HOLD
REL
4 1/2 DIGITS
1 Seconds
W2
TATE MA
RO
NU
A
L
8
835
62
106 626649
LY
Voltage lower than 108 Vac–check incoming ac
DO N
OT
01/13/03
H
Hz
PEAK MIN MAX
mV
mA
A
V
V
µA
V
OFF
A
mA µA
V
COM
!
10A MAX
FUSED
400mA MAX
FUSED
CAT II
1000V MAX
!
Winterization
To winterize the water valve and water line:
1. Shut off RV water supply to the ice maker.
2. Raise and lock shutoff arm in OFF position.
3. Disconnect the water inlet adapter from water
valve.
4. Disconnect the ice maker water line from water
valve.
Figure 63. Checking voltage to motor
NOTE
Do not unwrap the water line heater wire from the water
valve outlet connection.
5. Drain RV water supply line and ice maker water fill
line.
6. Bag and tape shut all connections.
www.norcold.com/cda
63
Publication No. 618968B (02-18-05)
NORCOLD, INC.®
P. O. Box 4248
Sidney, OH 45365-4248
NORCOLD, INC. CUSTOMER SERVICE
Telephone ................................. 1-800-444-7210
Fax ................................................ 937-497-3183
World Wide Web ........... www. norcold.com/cda